Category: Cardiovascular Disease

Cutting Down on Sedentary Time Reduces Cardiovascular Risk

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Source: Pixabay

Cutting down daily sedentary time can have a positive effect on the risk factors of cardiovascular disease and type 2 diabetes in as little as three months, according to a study published in the Journal of Science and Medicine in Sport. The study findings suggest that simply one hour less sitting daily and increasing light physical activity can help in the prevention of these diseases.

Regular exercise is well known to be beneficial in weight management and prevention of chronic diseases. However, many adults do not meet the weekly recommendation of 2.5 hours of moderate-intensity exercise, and the majority of the day is typically spent sitting.

In an intervention study, researchers investigated whether health benefits can be achieved by reducing daily sedentary time during a three-month intervention period. The research participants were sedentary and physically inactive working-age adults with an increased risk of type 2 diabetes and cardiovascular diseases.

The researchers compared two groups: the intervention group was guided to reduce their sitting time by one hour per day by increasing standing and light-intensity physical activity, while the control group was instructed to maintain their usual habits and sedentary lifestyle.

“What makes our research design unique is that sedentary time and physical activity of both groups were measured with accelerometers throughout the entire three-month period, whereas in earlier studies activity has typically been measured only for a few days at the beginning and end of the study period. This makes it possible to receive more information on the actual behaviour changes over a longer time period,” explained  Doctoral Candidate Taru Garthwaite from the University of Turku in Finland.

The intervention group reduced sedentary time by 50 minutes per day on average, mainly by increasing the amount of light- and moderate-intensity physical activity. Over the three-month period, the researchers observed benefits in health outcomes related to blood sugar regulation, insulin sensitivity and liver health in the intervention group.

“It is an encouraging thought that health benefits can be achieved by reducing the time spent sitting and increasing the amount of even light-intensity physical activity. For many, this may be an easier starting point than increasing actual exercise,” said Garthwaite.

People who do not meet the weekly physical activity recommendations atre the most likely to benefit the most from replacing sedentary time with light physical activity. However, reducing sedentary time is probably not enough in itself to prevent diseases if the person has several risk factors of diabetes and cardiovascular diseases.

Garthwaite stressed the encouraging nature of the findings: “Reducing the time spent sitting might still slow down the development of these diseases, but greater benefits can of course be gained by increasing the amount or intensity of physical activity in addition to sitting less.”

The researchers next aim to study how changes in daily activity and sedentary time affect energy metabolism and body composition in addition to the risk factors of diabetes and cardiovascular diseases over a six-month study period.

Source: University of Turku

Shift in Recommendations for Aspirin in CVD Prevention

Anatomical model of a human heart
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The US Preventive Services Task Force (USPSTF) has issued a recommendation statement on the use of aspirin in the prevention of cardiovascular disease (CVD). The recommendation shifts the use of aspirin to an earlier window, and making it an individualised decision for people in their 40s to 50s with a > 10% 10-year CVD risk.

The previous recommendation from 2016 had called for low-dose aspirin for people in their 50s with a > 10% 10-year CVD risk and individualised decisions for those in their 60s with similar risk. The update comes after new evidence emerged in a number of randomised controlled trials.

For the update, which appears in JAMA Network, a systematic review was conducted on the effectiveness of aspirin to reduce the risk of CVD events (myocardial infarction and stroke), cardiovascular mortality, and all-cause mortality in persons without a history of CVD. The effect of aspirin use on colorectal cancer incidence and mortality was also investigated in primary CVD prevention populations, as well as the harms (particularly bleeding) associated with aspirin use.

The USPSTF concludes with moderate certainty that aspirin use for the primary prevention of CVD events in adults aged 40–59 years with a 10% or greater 10-year CVD risk has a small net benefit, and starting low-dose aspirin use for CVD prevention should be an individual decision for them. Those not at increased risk for bleeding and are willing to take low-dose aspirin daily are more likely to benefit. The USPSTF recommends against initiating low-dose aspirin use for the primary prevention of CVD in adults 60 years or older.

Aspirin’s mechanism of action in CVD protection is well known. Aspirin at low doses is an irreversible cyclooxygenase 1 (COX-1) enzyme inhibitor, and at higher doses, it also inhibits COX-2. By inhibiting platelet function through COX-1, aspirin reduces atherothrombosis risk, and has been used widely for the prevention of CVD events, particularly for secondary prevention. However the COX-1 is also involved with protection of the gastrointestinal mucosa, and inhibition of it can promote gastrointestinal bleeding. The mechanism for the possible antineoplastic effects of aspirin is not as well understood.

Older age is one of the strongest risk factors for CVD, and men have a higher overall CVD disease burden and tend to experience CVD events earlier in life. Race and ethnicity affects CVD burden, with Black persons having the highest prevalence of CVD.

Similar CVD benefits appear for a low aspirin dose (≤ 100mg/d) and for all doses that have been studied in CVD prevention trials (50 to 500mg/d). A pragmatic approach would be to use 81 mg/d, which is the most commonly prescribed dose in the US.

Because CVD risk estimation is imprecise and imperfect at the individual level, the USPSTF suggests using these risk estimates as a starting point to discuss with appropriate candidates their desire for daily aspirin use. The benefits of initiating aspirin use are greater for individuals at higher risk for CVD events (eg, those with > 15% or > 20% 10-year CVD risk).

In addition to age and estimated level of CVD risk, decisions about initiating aspirin use should be based on shared decision-making between clinicians and patients about the potential benefits and harms, based on the relative values the patient places on these (reduced CVD risk vs increased bleeding and stroke risk).

Annual bleeding events in individuals without risk factors for increased bleeding (eg, history of gastrointestinal bleeding risk, history of peptic ulcer disease, or use of nonsteroidal anti-inflammatory drugs or corticosteroids) are rare, but risk for bleeding increases modestly with advancing age. For persons who have initiated aspirin use, the net benefits continue to accrue over time in the absence of a bleeding event. However, benefits shrink with advancing age because of increased bleeding risk, with modelling data suggesting stopping aspirin use around age 75.

Portable MRI Machines Extend Stroke Diagnosis Coverage

Credit: American Heart Association

Portable MRI machines, an emerging technology that makes medical imaging accessible even in remote locations, detected ischaemic strokes in 90% of patients scanned, according to a study appearing in the journal Science Advances.

In previous studies, portable MRI devices have demonstrated they can also detect haemorrhagic as well as ischaemic strokes, helping clinicians make crucial life-saving treatment decisions quickly in remote areas for patients who lack ready access to major hospitals with expensive stationary MRI machines, the authors say.

“This is the first systematic evidence you can detect ischaemic strokes using portable, bedside devices,” noted Kevin Sheth, professor of neurology and neurosurgery at Yale School of Medicine and co-corresponding author of the study.

Outcomes for stroke patients improve dramatically the quicker they receive treatment. But access to stationary MRI machines is limited for those who live far away from major hospitals or in developing countries. And even stroke patients who have access to major hospitals often have to wait for scans with stationary MRIs because of heavy demand for the equipment. Portable scans can be used at a patient’s bedside, in ambulances, or in remote clinics, Dr Sheth said.

In addition, quickly differentiating between different types of stroke is crucial for determining proper treatment, the researchers say. Ischaemic strokes are usually treated with blood thinners. But that course of treatment is dangerous for those who experience haemorrhagic strokes or strokes in which there is bleeding in the brain.

Analysing portable MRI scans from 50 patients at Yale New Haven Hospital, the Yale and Harvard researchers found that the results largely confirmed ischaemic stroke diagnoses made by stationary MRIs. For 45 of those patients, the portable MRI detected blood clots as small as 4mm in size.

Source: Yale University

Sweet Success for ‘Chocolate Touch’ Angioplasty Device

Credit: QT Vascular

In patients undergoing angioplasty, a study showed that use of the paclitaxel-coated balloon catheter known as the Chocolate Touch device had better outcomes at compared with those from use of a commercially-available balloon catheter. These findings were presented at the American College of Cardiology’s 71st Annual Scientific Session.

The trial showed noninferiority and an improvement in terms of the proportion of patients with adequate blood flow through the artery without subsequent procedures.

“I’m very excited that we now have a head-to-head comparison of a second-generation vs. first-generation drug-coated balloon and data that we can rely on to make decisions for our patients,” said Mehdi Shishehbor, DO, MPH, PhD, the study’s lead author. “I think that the superiority of Chocolate Touch indicates that as we improve the technologies, there is additional benefit to be gained. For me, this study makes the case that this [Chocolate Touch] will be the device of choice between these two devices for patients who require drug-coated balloon therapy.”

The trial enrolled 313 randomised patients treated for superficial femoral and popliteal artery disease – conditions that involve blocked arteries in the upper leg. All patients underwent balloon angioplasty, a procedure to reopen the artery by threading a tiny device into the blocked area and inflating a small drug-coated balloon that helps prevent reoccurance of the blockage . In half of the patients, a commercially-available Lutonix drug-coated balloon was used, and in the other half the Chocolate Touch balloon was used. The Chocolate Touch device has a constrained balloon, creating characteristic pillows and grooves reminiscent of a chocolate bar.

At 12 months, 78.8% of the patients who received the Chocolate Touch device and 67.7% of those receiving the Lutonix device achieved patency, or blood flow as measured by the peak systolic velocity ratio. No statistical difference in safety was seen between the devices, with a rate of major adverse events of 11.1% in the Chocolate Touch arm and 15.4% in the Lutonix arm. Major adverse events included a composite of death related to the targeted limb, major amputation and revascularidation procedures.

Dr Shishehbor said that estimates of mortality on a cumulative, year-by-year basis are consistently lower in the Chocolate Touch arm as compared to the Lutonix arm. For patients at the three-year follow-up, estimated mortality is 6.8% among patients receiving the Chocolate Touch device, which was also well below the trial’s goal of 13.2%, reinforcing confidence in the device’s safety profile.

“At a minimum, this [Chocolate Touch] device is as safe as the Lutonix, with a trend for lower mortality rates,” Dr Shishehbor said.

The Chocolate Touch device is designed to provide a more even and controlled widening of the artery. This design lets operators use a slightly larger balloon to further widen the artery and provide increased contact between the balloon surface with the paclitaxel coating, Dr Shishehbor said.

Although balloon angioplasty is the preferred treatment for blocked arteries in the leg, many patients experience recurring blockages, requiring additional procedures.

“If we are able to offer patients therapies that can keep the artery open for as long as possible, that will be welcome news,” Dr Shishehbor said. “As we advance our technologies and get more patency, or blood flow, over time, the patients will enjoy that benefit and have a lower likelihood of needing repeat procedures.”

Dr Shishehbor said that the trial paused enrollment for six months in response to industry-wide concerns over the safety of paclitaxel but said that the study ultimately achieved a high follow-up rate of 94%. The trial is also the first to allow combining the drug-coated balloon treatment with atherectomy, in which a blade is used to first remove plaque from the vessel prior to catheter balloon use. Dr Shishehbor said that while only a small number of patients was treated with atherectomy, the patency rate was promising. Future studies could determine whether Chocolate Touch treat longer and more complex blockages.

Source: American College of Cardiology

Thoracic Aorta Diameter Can Predict Cardiovascular Risk

Anatomical model of a human heart
Photo by Robina Weermeijer on Unsplash

A new study in the journal Radiology has found that the diameter of the thoracic aorta can be a biomarker for heart attacks and other adverse cardiovascular events in women and men, and has the advantage of being simple to add on to existing screening.

The thoracic aorta is divided into an ascending aorta that rises from the left ventricle of the heart and a descending aorta in the back of the chest.

While the thoracic aorta grows with age, but changes of vessel size and structure, a phenomenon known as vascular remodelling, have a systemic nature involving haemodynamic and biological processes that are also linked to cardiovascular disease.

“While enlargement of the thoracic aorta is a frequent finding in clinical practice, few longitudinal data regarding its long-term prognosis for major cardiovascular disease outcomes at the population level exist,” said study senior author Maryam Kavousi MD, PhD, from University Medical Center Rotterdam.

Dr Kavousi and colleagues assessed these associations in 2178 participants from the population-based Rotterdam Study. Participants underwent multi-detector CT scans between 2003 and 2006 and were followed for an average of 9 years. Thoracic aorta diameters were indexed for body mass index (BMI).

Larger BMI-indexed ascending and descending thoracic aortic diameters were significantly associated with increased risk of adverse cardiovascular outcomes like stroke and death in both women and men.

“Our results suggest that imaging-based assessment of diameter of thoracic aorta can be considered as a risk marker for future cardiovascular disease,” Dr Kavousi said.

In women, greater ascending aortic diameter was associated with 33% higher cardiovascular mortality risk. There seems to be a sex difference in remodelling of the ageing aorta, with faster deterioration in women.

“Ageing could affect aortic health and structure more adversely in women than in men,” Dr Kavousi said.

The study findings suggest that cardiovascular risk assessment associated with thoracic aortic size among asymptomatic women and men could lead to effective, sex-specific prevention strategies.

“As the aortic diameter is significantly related to body size, use of aortic diameters indexed for body measurements could improve its prognostic value for cardiovascular outcomes,” Dr Kavousi said.

Measurement of thoracic aorta size is an easy addition to current screening, the researchers said. The study made use of cardiac CT scans that are already commonly used to assess coronary calcium. Thoracic aortic diameter could also be measured routinely, for example as part of CT-based lung cancer screening.

The current study was based on a single CT-based assessment of thoracic aorta among a large group of participants from the general population, followed up for nine years for incidence of cardiovascular outcomes and mortality. The researchers have recently repeated the CT-based assessment of thoracic aorta among these participants after a median of 14 years.

“This provides an exciting and unique opportunity to study sex-specific risk profiles and patterns of growth in thoracic aorta in the general population,” Dr Kavousi said.

Source: Radiological Society of North America

Allergies Linked to Increased Cardiovascular Risk

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A national US health survey has revealed that adults with allergies are at an increased risk of hypertension and coronary heart disease, with the biggest risk increase seen in Black male adults. The study is presented at ACC Asia 2022 Together with the Korean Society of Cardiology Spring Conference.

“For patients with allergic disorders, routine evaluation of blood pressure and routine examination for coronary heart disease should be given by clinicians to ensure early treatments are given to those with hypertension or coronary heart disease,” said Yang Guo, PhD, the study’s lead author.

An association between allergic disorders and cardiovascular disease was detected in prior research, findings which remained controversial, Dr Guo explained. The present study sought to determine whether an increased cardiovascular risk exists in adults with allergic disorders.

The study used 2012 data from the National Health Interview Survey (NHIS), a cross-sectional survey of the US population. In the allergic group were adults with at least one allergic disorder, including asthma, respiratory allergy, digestive allergy, skin allergy and other allergy. The study included a total of 34 417 adults, over half of whom were women, average age 48.5 years. The allergic group included 10 045 adults. The researchers adjusted for age, sex, race, smoking, alcohol drinking and body mass index; they also examined subgroups stratified by demographic factors.

Having a history of allergic disorders was found to be associated with increased risk of developing hypertension and coronary heart disease. Further analysis showed that individuals with a history of allergic disorders between ages 18 and 57 had a higher risk of hypertension. An increased risk of coronary heart disease was seen in male Black/African American participants between ages 39-57. Asthma was the largest contributor of risk of hypertension and coronary heart disease.

Dr Guo said that to confirmed these findings, large cohort studies with long-term follow-up are required. Discovering the underlying mechanism could also help with management.

Source: American College of Cardiology

Not all Dietary Fibre Equally Good at Preventing CVD

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A study published in JAMA Network Open showed that cereal fibre but not fruit or vegetable fibre, was consistently associated with lower inflammation and lower CVD incidence. Until now there had been limited data on the link between fiber and inflammation among older adults, who have higher levels of inflammation compared with younger adults.

The research includes data from a large and well-characterised prospective cohort of elderly individuals, with detailed data on dietary intake, inflammation, and incidence of CVD. The research confirmed previously observed associations between dietary fibre and CVD and extended those investigations to include the source of the fibre, the relationship of fibre with multiple inflammatory markers, and to test whether inflammation mediated the relationship between dietary fibre and CVD.

Of the 4125 adults enrolled in the Cardiovascular Health Study from 1989 to 1990 participants received a food frequency questionnaire that was administered to those without prevalent CVD at enrollment and then were followed up visits for development CVD (stroke, myocardial infarction, and atherosclerotic cardiovascular death) through June 2015. Blood samples were assessed for markers of inflammation.

“Higher intakes of dietary fiber is associated with lower CVD risk. A common hypothesis has been that higher fiber intakes reduce inflammation, subsequently leading to lower CVD risk,” said Rupak Shivakoti, PhD. ‘With findings from this study, we are now learning that one particular type of dietary fiber — cereal fibre — but not fruit or vegetable fibre was associated with lower inflammation. With findings from this study we now are learning that cereal fiber has the potential to reduce inflammation and will need to be tested in future interventional studies.”

Although there are data to suggest that fibre in general might have anti-inflammatory effects by improving gut function, modifying diet and satiety (eg, reduced fat and total energy intake), and improving lipid and glucose profile metabolism, why cereal fibre but not vegetable or fruit fibre is associated with lower inflammation is not clear and warrants further investigation, noted Dr Shivakoti. Additionally, it is unclear whether it is the cereal fibre itself or other nutrients in foods rich in cereal fibre behind the observed relationships.

“Additionally, we learned that inflammation had only a modest role in mediating the observed inverse association between cereal fiber and CVD,” observed Dr Shivakoti. “This suggests that factors other than inflammation may play a larger role in the cereal fiber-associated reduction in CVD and will need to be tested in future interventions of specific populations.

Source: Columbia University’s Mailman School of Public Health

Cardiovascular Risk Factors in Childhood Predict Adulthood Risks

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By tracking more than 38 000 participants from childhood for fifty years, researchers have uncovered direct evidence that the five cardiovascular risk factors when present in childhood predicted cardiovascular risk in adulthood. 

Body mass index, blood pressure, cholesterol, triglycerides and youth smoking, particularly in combination in early childhood, were clinically linked with cardiovascular events that predict poor cardiovascular health in adults.

The international study conducted by the International Childhood Cardiovascular Consortium (i3C) and published in the New England Journal of Medicine, found that the increased cardiovascular risk began as early as 40 years of age.

Paper co-author Prof Terence Dwyer at the University of Oxford commented: “Despite the effect medical and surgical care have had on treating heart disease, achieving the greatest possible reduction in the heart disease burden will depend on including preventive strategies that commence in childhood.”

The findings confirm that prevention must start in childhood. “Longitudinal studies like these have been hampered by a lack of inclusion of comprehensive childhood data around body measurements, blood pressure, and blood lipids and a failure to follow-up at ages when cardiovascular disease becomes common.”

The study involved 38 589 participants from Australia, Finland and the US, who were followed from age 3-19 years for a period of 35-50 years. 

The results showed that increased risk for cardiovascular events was seen in over half the children, with those having the highest risk factor levels, at 9 times the risk for an event as for children with below average risk factors.

“While this evidence had not been available previously, the findings were not entirely surprising as it had been known for some time that children as young as five already showed early signs of fatty deposits in arteries. This new evidence justified a greater emphasis on programs to prevent the development of these risk factors in children. Clinicians and public health professionals should now start to focus on how this might best be achieved,” Prof Dwyer concluded.

Source: Murdoch Childrens Research Institute

In Flu Season, Vaccine Reduces Cardiovascular Events in Heart Failure

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A randomised controlled trial showed that people with heart failure receiving an annual flu shot had lower rates of pneumonia and hospitalisation on a year-round basis and a reduction in major cardiovascular events during peak flu season – but not year-round.

The study, presented at the American College of Cardiology’s 71st Annual Scientific Session, is the first randomised controlled trial to assess the benefits of the flu vaccine in people with heart failure, who face a high risk of cardiovascular events. It was conducted in countries across Asia, Africa and the Middle East where getting a flu shot is not commonplace.

Lead author Mark Loeb, MD, said: “Although our prespecified endpoints were not significant, our data suggest that there’s a clinical benefit [to getting a flu shot] given the clear reduction in pneumonia, moderate reduction in hospitalisation and reduction in vascular events and deaths during periods of peak influenza. When taken together with previous trials and observational studies, the collective data demonstrate there is a substantial benefit to receiving a flu vaccine for people with heart failure.”

Heart failure is a condition in which the heart becomes too weak or stiff to pump blood effectively. Previous studies have shown that people with heart disease or cardiovascular risk factors face an elevated risk of complications when they contract influenza, but there has been a lack of evidence on whether flu vaccines can help to mitigate this risk specifically in people with heart failure.

The trial enrolled 5129 patients with heart failure in 10 countries where flu vaccines are not common. Participants did not routinely get flu shots and had previously received a flu shot no more than once during the three years preceding the trial. Participants were randomised to receive a flu shot or a placebo annually for up to three years, though they could still get a flu shot outside of the trial. Researchers tracked health outcomes for a median of 2.9 years. The trial’s primary endpoint was a composite of death from cardiovascular causes, non-fatal heart attack or non-fatal stroke. Its co-primary endpoint included a composite of any of these events plus hospitalisation for heart failure.

Overall, the composite primary endpoint occurred in 691 participants and 1470 experienced the composite co-primary endpoint. When analysed on a year-round basis there was no significant difference in the rates of these events between those who had received a flu vaccine and those who had not.

Separate analyses of hospitalisation, pneumonia and other respiratory outcomes however found that rates of pneumonia were 42% lower and hospitalisations were down 15% among those who received a flu shot.

The flu vaccine arm showed a significant reduction in the first primary endpoint, as well as reductions in all-cause death and cardiovascular death, when the analysis was limited to periods of peak influenza circulation. When influenza circulation was low, no significant difference was seen.

The researchers accounted for the differences in influenza circulation seasons. Based on these results, researchers said the flu vaccine did help to protect patients from influenza complications, including cardiovascular events.

“Many of the effects we found during peak flu circulation disappeared outside of it,” Dr Loeb said. “There’s no biological explanation for that other than influenza infections.”

While the study was conducted in countries where the flu vaccine is either not widely available or not common to receive, Dr Loeb said the results could likely be generalisable even in countries where flu vaccine uptake is higher. Study participants were allowed to get a flu vaccine outside of the study, but Dr Loeb said that there was no impact on the findings as very few did so. He added that the study was stopped early in four countries due to the COVID pandemic.

Loeb said that additional trials and large-scale observational studies could further clarify the health benefits of influenza vaccination in people with cardiovascular disease.

“I think this study offers an important message about vaccines generally – that it is important to do randomised controlled trials in populations that historically haven’t had a very high uptake of vaccines,” Dr Loeb said. “These types of [research] gaps have to be filled.”

Source: American College of Cardiology

Mavacamten is Promising in Reducing Shortness of Breath in Cardiomyopathy

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A new drug, mavacamten, shows promise in providing relief to cardiomyopathy patients experiencing shortness of breath, according to new research presented at the American College of Cardiology (ACC) Scientific Session.

Dr Florian Rader presented results of an international clinical trial showing that mavacamten alleviated the shortness of breath in patients with obstructive hypertrophic cardiomyopathy.

The genetic condition causes thickening of the heart muscle, and as a result, heart muscle cells enlarge and scarring often develops between cells. Patients with the condition typically experience shortness of breath, chest pressure, irregular heartbeat, and, although rare, sudden cardiac arrest.

“Until now, existing treatments for hypertrophic cardiomyopathy have been suboptimal, leaving most patients symptomatic and often, in need of invasive or even open-heart surgery,” said Dr Rader, who served as site principal investigator of the clinical trial at Cedars-Sinai Hospital. “Follow-up data from this extended clinical trial shows success in lessening the obstruction to blood flow out of the heart in hypertrophic cardiomyopathy. Along with this relief of obstruction came substantial improvements in symptoms and an important heart failure blood biomarker.”

As Dr Rader explained, mavacamten showed preliminary success in relieving symptoms associated with the condition – chiefly, shortness of breath, which can be debilitating.

Key data from the clinical trial includes:

  • The average age of the 231 clinical trial participants was 60 years old, and 39% of those on the trial were female. The median follow-up was 62 weeks.
  • 69% of trial participants had improved shortness of breath after 48 weeks of treatment.
  • Treatment with mavacamten was generally well tolerated, and no new safety concerns were raised during longer-term follow-up.

Dr Rader said that no disease-specific targeted treatment options have been developed for the condition since it was first described some 60 years ago.

Though the prevalence of hypertrophic cardiomyopathy is roughly 1 in every 200 patients, Dr Rader said that the condition is thought to be widely underdiagnosed.

“A lot of patients have the condition and often feel short of breath or palpitations but their doctor doesn’t recognise these symptoms as stemming from hypertrophic cardiomyopathy,” Dr Rader said. “Instead, patients may be told by their physician they are out of shape, need to lose weight or are suffering from an anxiety condition.”

The correct approach, said Dr Rader, is to first pay close attention to the patient’s symptoms. If shortness of breath is a main concern, then a doctor should listen to the patient’s heart for a murmur, then follow up with an electrocardiogram, and, ultimately, an echocardiogram, which most often will lead to the correct diagnosis.

Source: Cedars-Sinai Medical Center