Heart Failure Causes and Symptom

Heart failure occurs when the heart can’t pump blood as efficiently as it should, limiting the amount of oxygen and nutrients that reach the body. Over time, this can lead to fatigue, shortness of breath and swelling in the legs or abdomen.

The condition often develops gradually, usually after the heart has been weakened or damaged by another problem such as high blood pressure, coronary artery disease, or a past heart attack. Some people live with risk factors for years before noticing symptoms. Recognizing the early signs—and treating underlying causes—can slow or even prevent heart failure from progressing.

What Causes Heart Failure

Heart failure can develop for many reasons. Sometimes it results from lifestyle factors, other times from underlying heart conditions or genetics. Common causes include coronary artery disease, high blood pressure, valve problems, heart rhythm disorders, viral infections or side effects from certain medications such as chemotherapy. In some cases, conditions like diabetes, pregnancy complications or congenital heart defects can also play a role.

Understanding what contributes to heart failure can help you and your care team create a treatment plan that supports your long-term heart health.

Symptoms of Heart Failure

Heart failure symptoms can appear gradually or suddenly, and they vary from person to person. Many people notice shortness of breath during activity—or even while resting—along with swelling in the legs, ankles or abdomen caused by fluid buildup. Fatigue and weakness are also common, making everyday activities more difficult.

Other symptoms may include a persistent cough or wheezing, a rapid or irregular heartbeat, or sudden weight gain due to fluid retention. Some people experience reduced appetite, nausea or difficulty sleeping, while others report confusion or trouble concentrating as the heart struggles to supply enough oxygen-rich blood to the body.

If you notice any of these signs, it’s important to talk with your primary care provider or request an appointment with Broward Health’s Heart Failure Program. Early diagnosis and treatment can help you feel better, prevent complications and protect your heart function over time.