Match each distinctive cardiac auscultation finding and its response to dynamic bedside maneuvers with the most likely underlying structural valvular pathology.
- A mid-systolic click followed by a late systolic murmur; the click moves earlier in systole and the murmur lengthens during the strain phase of the Valsalva maneuver.Myxomatous degeneration of the mitral valve
- A harsh, crescendo-decrescendo systolic murmur at the right upper sternal border with radiation to the carotids; decreases in intensity with standing.Age-related calcification of the aortic valve
- A blowing holosystolic murmur at the left lower sternal border; increases in intensity during inspiration.Dilation of the tricuspid valve annulus
- A high-pitched, blowing, early diastolic decrescendo murmur best heard at the left third intercostal space; intensity increases with sustained handgrip.Incomplete closure of the aortic cusps
Answer
The auscultatory findings match exactly with their respective structural pathologies based on hemodynamic responses to maneuvers.
Each auscultatory finding and its response to bedside maneuvers uniquely identifies a specific valvular pathology. Myxomatous degeneration causes mitral valve prolapse (earlier click/longer murmur with decreased preload). Aortic calcification causes aortic stenosis (softer murmur with decreased preload). Tricuspid dilation causes regurgitation (louder with inspiration). Aortic valve incompetence causes regurgitation (louder with increased afterload).
Step-by-Step Solution
Key Concept
Dynamic auscultation helps differentiate structural heart diseases by altering hemodynamics (preload and afterload), which predictably changes murmur intensity and timing.