What is a common symptom of left-sided heart failure?

In left-sided heart failure, a common symptom is orthopnea, which is characterized by difficulty breathing when lying flat. This occurs due to pulmonary congestion and fluid accumulation in the lungs, which can result from impaired left ventricular function. When a person lies down, the redistribution of body fluids to the thoracic cavity exacerbates this congestion, leading to shortness of breath. Patients may find relief by propping themselves up with pillows or sitting in an upright position.

Fatigue and weakness can also be present in left-sided heart failure, but orthopnea is more directly associated with the pulmonary complications of this condition. Edema in the lower extremities and pitting edema are typically more indicative of right-sided heart failure or fluid overload in the body. Thus, orthopnea stands out as a key symptom that directly relates to the effects of left-sided heart failure on lung function and respiratory status.