Which of the following is a symptom related to left-sided heart failure?

In the context of left-sided heart failure, the presence of cyanosis is closely associated with the condition. Left-sided heart failure often leads to the accumulation of fluid in the lungs, causing pulmonary congestion. This congestion can impair the transfer of oxygen into the bloodstream, leading to reduced oxygen levels in the extremities and resulting in cyanosis, characterized by a bluish discoloration of the skin, particularly in areas such as the lips, fingers, and toes.

Other symptoms of left-sided heart failure include weakness or fatigue, which arise due to decreased cardiac output and tissue perfusion. However, this symptom is more general and can be seen in various conditions. Jugular venous distention and pitting edema are typically associated with right-sided heart failure, where the heart fails to effectively pump blood returning from the body, leading to fluid retention and increased venous pressure. Therefore, while weakness or fatigue can occur in left-sided heart failure, cyanosis stands out as a specific and critical symptom that highlights the oxygenation issues resulting from this condition.