15 Heart Murmur Symptoms That May Indicate Serious Issues

Jeff King

9. Persistent Cough (Especially Nocturnal) & Wheezing: Pulmonary Overload

A woman coughing. Photo Credit: Envato @Rawpixel

A chronic, unexplained cough, especially one that worsens when lying down at night, or persistent wheezing, can be a subtle yet significant warning sign of a serious heart murmur. These respiratory symptoms occur because a struggling heart, particularly due to a leaky valve, causes blood to back up into the lungs. This leads to fluid congestion in the pulmonary system, mimicking respiratory illnesses. This "cardiac cough" or wheezing signifies a dangerous fluid overload in the lungs, directly attributable to heart dysfunction.

10. Rapid or Unexplained Weight Gain (Fluid Retention): The Silent Buildup

Weight gaining concept. Frustrated slim european woman taking step onto scale to measure her weight. Photo Credit: Envato @StudioVK

Sudden or unexplained weight gain, often without changes in diet or activity, can be an alarming symptom of a serious heart murmur. This increase in weight is primarily due to fluid retention (edema) caused by the heart's diminished pumping capacity, leading to water accumulation in tissues rather than being properly circulated and excreted. This silent buildup of fluid indicates significant heart strain and potential worsening of congestive heart failure, demanding prompt medical attention to manage the underlying cardiac issue.

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9. Persistent Cough (Especially Nocturnal) & Wheezing: Pulmonary Overload

10. Rapid or Unexplained Weight Gain (Fluid Retention): The Silent Buildup

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