A simple memory rule: “left backs into the lungs; right backs into the systemic veins” — while remembering overlap is common.
Left-sided dysfunction raises pressure behind the LV into the LA and pulmonary circulation, causing pulmonary congestion. Right-sided dysfunction raises systemic venous pressure, producing JVD, peripheral edema, hepatic congestion, ascites, and weight gain. The two often overlap, and left HF is a common cause of secondary right HF.
Left → lungs
Right → systemic veins
Nursing role
Assess both the lungs and systemic venous congestion even when the chart says “left HF” or “right HF,” because mixed findings are common and often more clinically relevant than the label.
Common misconception
“Peripheral edema proves right HF.” False. Edema is nonspecific and occurs in biventricular HF, renal, venous, and liver disease, medication effects, and more.
Check answer
Which findings most support left-sided (pulmonary) congestion?
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