Symptoms of Heart Muscle Weakness

Published at 12 January 2026

Heart muscle weakness, also known as heart failure, is a condition in which the heart cannot pump blood efficiently enough to meet the body’s needs. It can result from several medical conditions, including coronary artery disease, high blood pressure, heart valve disease, and cardiomyopathy.

Early detection of heart weakness symptoms can be life-saving. It is essential to consult a doctor if you notice any concerning signs, as early diagnosis and proper treatment significantly improve survival and quality of life. (1)

Symptoms of Heart Muscle Weakness

Symptoms of heart weakness occur due to insufficient oxygen and nutrient supply to muscles and organs, along with fluid buildup in the body (congestion). You may experience one or more of the following common symptoms: (2)

1. Shortness of Breath

Often the first symptom noticed, it may appear during routine daily activities such as climbing stairs. As the condition progresses, breathing may become difficult even during simple tasks or while at rest.

2. Fluid Retention

Fluid can accumulate in the feet, ankles, legs, and abdomen, causing swelling and sudden weight gain. Swelling is often worse by the end of the day.

3. Persistent Cough

Caused by fluid buildup in the lungs, usually worsening at night. The cough may produce white or pink-tinged mucus, and occasionally blood.

4. Discomfort When Lying Down

You may experience sudden shortness of breath at night or when lying flat, prompting you to sit up or move to breathe more comfortably. Some patients find relief only by using multiple pillows to elevate the upper body.

5. Fatigue

Persistent fatigue may make it difficult to perform daily tasks such as shopping or walking short distances. You may feel sleepy after meals, weak in the legs while walking, or short of breath during exertion.

6. Heart Palpitations

A sensation of rapid, strong, or irregular heartbeat, often caused by the heart working harder to pump blood throughout the body.

7. Weight Changes

Sudden weight gain due to fluid retention.
Weight loss may occur from reduced blood flow to the digestive system.

8. Other Symptoms

May include nausea, loss of appetite, dizziness, mental fog, and difficulty concentrating.

When to See a Doctor

Heart weakness symptoms can sometimes be mild or mistaken for fatigue, aging, or routine tiredness.

Do not ignore these signs. If you notice any of the symptoms listed above, consult a doctor immediately. Early intervention can prevent progression to more serious and life-threatening stages.

Waiting for more obvious symptoms can allow the condition to worsen significantly. Early diagnosis and treatment make a major difference in long-term heart health. (3)

At Al Ahli Hospital’s Cardiology Department, we help detect early signs of heart weakness and take proactive steps to protect your heart.