Heart failure is one of the most common and serious health problems in the world. Millions of people live with this condition, and the number continues to grow as people live longer and rates of obesity, diabetes, and high blood pressure increase.
Heart failure does not mean that the heart has stopped working. Instead, it means that the heart cannot pump blood around the body as well as it should.
The heart acts like a powerful pump that sends oxygen and nutrients to every part of the body. When the heart cannot do this job properly, the body starts to struggle. People may feel tired even after simple activities.
They may become short of breath when walking or lying down. Some people develop swelling in their feet, legs, or stomach because fluid begins to build up in the body.
Many people think heart failure always happens because the heart muscle becomes weak. This is true for one common type of heart failure, where the heart cannot squeeze strongly enough to push blood out. However, doctors now know there is another major form of heart failure that is just as common.
In this second type, the heart still pumps normally, but it becomes stiff and does not relax properly between beats. Because it cannot relax enough, it cannot fill with the amount of blood the body needs. This condition is called heart failure with preserved ejection fraction, or HFpEF. It is sometimes known as “stiff heart” failure.
HFpEF is especially common among older adults. It also occurs more often in people with high blood pressure, diabetes, obesity, and other long-term health conditions. Despite affecting many people, doctors still do not have many treatments that clearly improve outcomes in these patients. This has made HFpEF one of the biggest challenges in heart care.
A new study from the University of Vermont has now raised questions about a group of medicines called beta-blockers. These drugs have been used for many years to treat different heart conditions. They slow the heart rate and lower blood pressure, reducing the amount of work the heart has to do.
In people with the weak-heart form of heart failure, beta-blockers can lower the risk of death and reduce hospital visits. Because of their success in these patients, doctors often prescribe them to people with HFpEF as well.
However, the new research suggests that these medicines may not always help people with stiff heart failure and may even cause problems for some patients.
The researchers looked at information from a large clinical study called the TOPCAT trial. The trial included many people who had been diagnosed with HFpEF. About 80 percent of these patients were taking beta-blockers.
When the researchers carefully examined the data, they found a surprising result. Patients who were taking beta-blockers were 74 percent more likely to be admitted to the hospital because of heart failure than patients who were not taking these medicines.
The findings suggest that treatments that work very well for one type of heart failure may not automatically work for another type. In HFpEF, the heart already has trouble relaxing and filling with blood.
Some experts believe that slowing the heart with beta-blockers could increase pressure inside the heart in certain patients. This may lead to more fluid buildup and worsening symptoms such as swelling and breathlessness.
The study highlights an important lesson in medicine. Diseases that share the same name can sometimes behave very differently. Heart failure is not a single disease but a group of related conditions. Different forms of heart failure may require different treatment plans.
For patients and their families, these findings are a reminder to ask questions about medications and to discuss treatment choices with their healthcare team. People should never stop taking prescribed medicines on their own. Instead, they should talk with their doctor about whether a treatment is supported by evidence for their particular condition.
The study was led by Dr. Timothy Plante from the University of Vermont and was published in the journal JAMA Network Open. The researchers hope their findings will encourage more studies aimed at finding safe and effective treatments for HFpEF. At present, stiff heart failure remains one of the biggest unmet needs in cardiovascular medicine.
As scientists continue learning more about the different forms of heart failure, they are gaining a better understanding of why some treatments help certain patients but not others. This growing knowledge could lead to more personalized care and better outcomes for millions of people living with heart disease around the world.
If you care about heart health, please read studies about top 10 foods for a healthy heart, and how to eat right for heart rhythm disorders.
For more health information, please see recent studies about how to eat your way to cleaner arteries, and salt and heart health: does less really mean more?
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