“Heart disease is one of the most common and serious health conditions,” warns Dr. Cheng-Han Chen, interventional cardiologist. “Early detection can save lives.” Chronic fatigue is often an overlooked, yet telling, sign of heart issues.
You Might Notice Unusual Symptoms
“Women and people with diabetes often don’t experience classic symptoms. For them, fatigue, nausea, or a vague feeling of being unwell may be the only warning signs,” explains Dr. Bradley Serwer, interventional cardiologist.
The Journal of Cardiac Failure 2023 study and the American Heart Association confirm that fatigue and exhaustion are common signs of heart failure.
“When the heart muscle is weak, it can’t pump enough blood to keep the body running smoothly — leading to fatigue.”
But there’s more. Congestive heart failure can cause fluid buildup in the lungs, making it harder to breathe and creating a vicious cycle of chronic fatigue, shortness of breath, and poor sleep.
“Many can’t lie down because breathing gets harder, so they have to sleep sitting up,” adds Dr. Serwer. “This sleep isn’t restful, which only worsens exhaustion.”
Why Don’t We Take It Seriously?
Fatigue feels too everyday. We often blame stress, lack of sleep, or age, says Dr. Gould. Dr. Serwer notes many just try to “push through” or hope it will pass.
“We’ve been taught that a heart attack is sudden and dramatic — chest pain, shortness of breath, or fainting. When symptoms aren’t intense, people often ignore them,” says Dr. Serwer.
Important to know: Not all fatigue signals heart trouble, but if it’s persistent or comes with other suspicious symptoms, get checked out.
“Fatigue can stem from many lifestyle and medical causes, but often only a thorough medical exam reveals the true reason,” emphasizes Dr. Chen.
When to Suspect Heart Trouble Behind Fatigue
It’s easy to fall into the trap of just feeling tired. But if fatigue doesn’t improve with extra rest or sleep, especially when daily tasks become tough, it’s time to pay attention.
“Patients usually describe feeling tired all the time, and extra sleep doesn’t help.”
Dr. Serwer points out that fatigue disproportionate to effort is a red flag: “Eventually, patients can’t manage basic daily tasks like dressing, cooking, or cleaning. They often report mental fatigue too, which low oxygen levels can cause.”
Don’t Ignore These Symptoms Either
While chronic fatigue is one of the sneakiest signs, it’s not the only one. Dr. Chen highlights these symptoms may also point to heart problems:
- Shortness of breath, especially during physical activity,
- Chest pain,
- Dizziness or fainting,
- Palpitations,
- Swelling in the legs or ankles
Dr. Serwer strongly advises: “Pay attention to these symptoms and don’t sweep them under the rug! Depending on what you experience, urgent or timely medical evaluation might be necessary. If emergency care finds no immediate life-threatening issue, you may be referred to a cardiologist for further tests.”
