Left-Sided Heart Failure vs Right-Sided Heart Failure
Heart failure manifests differently depending on which ventricle fails — and the NCLEX requires you to quickly match symptoms to the correct side. This comparison breaks down the key differences in presentation, assessment findings, and nursing priorities.
Side-by-side comparison
- Blood backs up into the lungs
- Caused by HTN, CAD, valve disease
- Blood backs up into systemic veins
- ★Most often caused by left-sided HF
- ★Dyspnea, orthopnea, PND
- Crackles; dry cough → pink frothy sputum
- ★Peripheral/dependent edema, JVD
- Ascites, hepatomegaly, weight gain; lungs clear
- SpO₂ and lung auscultation
- ABGs for oxygenation status
- Daily weights and strict I&O
- Abdominal girth measurement
- High Fowler's to ease breathing
- Assess oxygenation and lung sounds
- Elevate extremities to reduce edema
- Monitor weight and fluid balance
- Diuretics, ACEi/ARB, beta-blocker
- Acute: O₂, nitroglycerin, morphine (↓ preload)
- Diuretics, ACEi/ARB; Na⁺ & fluid restriction
- Treat underlying cause (often left HF)
- Report worsening dyspnea or orthopnea
- Sleep upright; adhere to meds
- Daily weights; report >2–3 lb/day gain
- Limit sodium and fluids
- ★Acute pulmonary edema is an emergency
- Sit upright, O₂, IV diuretic, nitrates
- Rapid weight gain + worsening ascites
- New dyspnea → biventricular failure
- Acute pulmonary edema
- Progresses to right-sided HF
- Hepatic congestion, cardiac cirrhosis
- Anasarca from systemic overload
Left-Sided HF
- Blood backs up into the lungs
- Caused by HTN, CAD, valve disease
Right-Sided HF
- Blood backs up into systemic veins
- ★Most often caused by left-sided HF
Left-Sided HF
- ★Dyspnea, orthopnea, PND
- Crackles; dry cough → pink frothy sputum
Right-Sided HF
- ★Peripheral/dependent edema, JVD
- Ascites, hepatomegaly, weight gain; lungs clear
Left-Sided HF
- SpO₂ and lung auscultation
- ABGs for oxygenation status
Right-Sided HF
- Daily weights and strict I&O
- Abdominal girth measurement
Left-Sided HF
- High Fowler's to ease breathing
- Assess oxygenation and lung sounds
Right-Sided HF
- Elevate extremities to reduce edema
- Monitor weight and fluid balance
Left-Sided HF
- Diuretics, ACEi/ARB, beta-blocker
- Acute: O₂, nitroglycerin, morphine (↓ preload)
Right-Sided HF
- Diuretics, ACEi/ARB; Na⁺ & fluid restriction
- Treat underlying cause (often left HF)
Left-Sided HF
- Report worsening dyspnea or orthopnea
- Sleep upright; adhere to meds
Right-Sided HF
- Daily weights; report >2–3 lb/day gain
- Limit sodium and fluids
Left-Sided HF
- ★Acute pulmonary edema is an emergency
- Sit upright, O₂, IV diuretic, nitrates
Right-Sided HF
- Rapid weight gain + worsening ascites
- New dyspnea → biventricular failure
Left-Sided HF
- Acute pulmonary edema
- Progresses to right-sided HF
Right-Sided HF
- Hepatic congestion, cardiac cirrhosis
- Anasarca from systemic overload
★ marks the fact that sets a column apart.
Clinical Pearl
Remember: LEFT = LUNGS, RIGHT = REST of body. Left-sided failure almost always develops first, and right-sided failure is most commonly a consequence of left-sided failure (because pulmonary congestion increases right ventricular afterload). When you see biventricular failure, you'll see both sets of symptoms — but the NCLEX typically asks you to identify which side based on a single set of findings.
Play this as a game — free
Drill Left-Sided Heart Failure vs Right-Sided Heart Failure in Swipe Right & Speed Sort. 14-day free trial, no card required.