Audio Resources for Pulmonary Regurgitation Murmurs
Unfortunately, the ACC/AHA guidelines and available medical literature do not provide audio links or recordings of cardiac murmurs, including pulmonary regurgitation 1.
What You Need to Know About the Pulmonary Regurgitation Murmur
Since audio resources aren't available in clinical guidelines, here's what to listen for based on the authoritative ACC/AHA guidance:
High-Pitched PR (with Pulmonary Hypertension)
- Character: High-pitched, decrescendo diastolic murmur 1
- Timing: Begins immediately with or shortly after S2 1
- Mechanism: Rapid decline in regurgitant volume during diastole creates the decrescendo pattern 1
- Similar to: Aortic regurgitation murmur (also high-pitched and decrescendo)
Low-Pitched PR (without Pulmonary Hypertension)
- Character: Low to medium pitched diastolic murmur 1
- Timing: Slightly delayed onset after pulmonic valve closure 1
- Why delayed: Minimal regurgitant flow initially when the reverse pressure gradient is small 1
- Classic context: Common after tetralogy of Fallot repair 1
Key Distinguishing Feature
The pitch tells you about pulmonary pressures: High-pitched = pulmonary hypertension present; low-pitched = normal pulmonary pressures 1.
Alternative Learning Resources
While guidelines don't provide links, consider these approaches:
- Medical education websites (e.g., University of Michigan Heart Sound & Murmur Library, Littmann Learning Institute)
- Cardiology textbook companion websites often include audio files
- Point-of-care ultrasound with Doppler can demonstrate the regurgitant flow pattern in real-time during your examination
The murmur increases with inspiration (right-sided lesion) 1, which helps confirm you're hearing pulmonary rather than aortic regurgitation.