Heart failure is a serious condition that affects millions of people around the world. It happens when the heart cannot pump blood as well as it should.
One common type is called heart failure with preserved ejection fraction, or HFpEF. In this condition, the heart seems to pump normally, but it becomes stiff and cannot fill properly. This leads to symptoms such as tiredness, shortness of breath, and weakness.
A new study led by Johns Hopkins Medicine has found that people with severe obesity and this type of heart failure may have weaker heart muscles than expected. The research was published in the journal Science and provides new insight into how obesity affects the heart. fileciteturn1file0
The researchers examined heart muscle cells from patients with HFpEF. They found that in people with severe obesity, the heart muscle cells could not contract as strongly as they should. This means the heart may not be as effective at pumping blood, even if standard tests suggest it is working normally.
To better understand this, the scientists compared heart tissue from different groups. They looked at people with severe obesity and HFpEF, people with less obesity and HFpEF, and healthy individuals. They found that the most obese group had the weakest muscle function.
The study also discovered a chemical change in a protein called troponin I. This protein is very important for muscle contraction. In people with severe obesity and HFpEF, this protein was altered in a way that reduced the strength of heart muscle contraction.
One of the most encouraging findings came from a smaller group of patients who lost weight. These individuals underwent weight loss treatment over time. The researchers found that those who lost more weight showed improved heart muscle function. In some cases, their heart cells worked almost like normal again.
This suggests that the damage may not be permanent and that weight loss could help reverse some of the problems. This is an important message for patients and doctors.
When analysing the study, it is strong because it looks directly at human heart tissue, which provides detailed and reliable information. It also connects changes at the cellular level to real health outcomes.
However, the study has some limitations. The number of patients who underwent weight loss therapy was small, and more research is needed to confirm the findings in larger groups. It also does not prove that weight loss will fully restore heart function in all patients.
Even so, the results are very promising. They suggest that managing weight could play a key role in treating this type of heart failure. It also opens the door for new treatments that target the specific protein changes found in the study.
Overall, this research gives new hope that lifestyle changes and medical treatments may improve heart health in people with severe obesity.
If you care about weight loss, please read studies that hop extract could reduce belly fat in overweight people, and early time-restricted eating could help lose weight .
For more health information, please see recent studies that Mediterranean diet can reduce belly fat much better, and Keto diet could help control body weight and blood sugar in diabetes.
Source: Johns Hopkins Medicine.
