What Causes Heart Failure and What Are Its Symptoms?

Heart failure is a chronic medical condition in which the heart muscle is unable to pump enough blood to meet the body’s demands for oxygen and nutrients. It does not mean that the heart has stopped working completely, but rather that it has become weakened or damaged to the point where it cannot function effectively. There are several underlying causes that can lead to heart failure. 

One of the most common causes is coronary artery disease, which occurs when the arteries supplying blood to the heart become narrowed or blocked due to fatty deposits called plaques. This reduces blood flow to the heart muscle, gradually weakening it over time. High blood pressure, or hypertension, is another major cause. When the heart has to pump against consistently high pressure, the heart muscles thicken and stiffen, eventually losing their ability to contract and relax properly. Heart attacks, which permanently damage heart muscle tissue, can also contribute to heart failure. Other contributing factors include valvular heart disease, where faulty heart valves prevent proper blood flow, and cardiomyopathy, which refers to diseases of the heart muscle itself caused by genetics, infections, alcohol abuse, or certain medications. Additional causes can include diabetes, obesity, thyroid disorders, chronic kidney disease, and prolonged alcohol or drug use, all of which put extra strain on the heart and increase the likelihood of heart failure developing.

The symptoms of heart failure often develop gradually and may initially be mistaken for signs of aging or other health problems. One of the hallmark symptoms is shortness of breath, especially during physical activity or when lying flat. This occurs because the weakened heart cannot pump blood efficiently, leading to a buildup of fluid in the lungs. Persistent fatigue and weakness are also common, since less oxygen-rich blood reaches the muscles and tissues. Swelling in the legs, ankles, feet, and sometimes the abdomen, is another key symptom caused by fluid retention. People with heart failure may also notice rapid or irregular heartbeats, as the heart tries to compensate for its reduced pumping ability. A chronic cough, wheezing, or production of pink, frothy sputum can occur due to fluid buildup in the lungs. Difficulty concentrating, confusion, or reduced alertness may appear as less blood reaches the brain. Weight gain from fluid retention can also signal the presence of heart failure. In more advanced stages, even simple daily activities such as climbing stairs, walking short distances, or carrying groceries can become extremely exhausting.

It is important to recognize that the severity and combination of symptoms can vary from person to person, depending on the type of heart failure and how advanced it is. Some individuals may develop left-sided heart failure, where the left ventricle fails to pump blood effectively, leading primarily to breathing problems. Others may experience right-sided heart failure, which causes fluid buildup in the legs and abdomen. In many cases, both sides of the heart are affected. Since symptoms can overlap with other diseases, early diagnosis is essential. Doctors usually perform a physical examination, imaging tests such as echocardiograms, blood tests, and sometimes electrocardiograms to confirm heart failure and determine its underlying cause.

In conclusion, heart failure is a serious condition with multiple possible symptoms—shortness of breath, fatigue, swelling, irregular heartbeat, and cognitive difficulties—are the body’s signals that the heart is struggling to keep up with its workload. Early detection and proper management are crucial, as untreated heart failure can worsen over time and significantly affect quality of life. With timely medical intervention, lifestyle adjustments, and adherence to treatment, many people with heart failure can lead longer, healthier, and more active lives.

Author: 

Prof. Dr. Md. Atahar Ali

MBBS, FCPS (Internal Medicine), MD (Cardiology)

Senior Consultant- Cardiology Care Centre

Evercare Hospital Dhaka