Question
Match List I with List II and select the correct answer using the code given below the lists:
List I (Auscultatory findings) List II (Cardiac condition) A Wide fixed split in the second heart sound 1 Pulmonary hypertension B Continuous machinery murmur 2 Atrial septal defect C Muffled heart sounds 3 Patent ductus arteriousus D Wide variable split in the second heart sound 4 Pericardial effusion
The correct answer is
| A | B | C | D |
| 2 | 3 | 4 | 1 |
Cardiac Auscultation Findings Explained
This solution details the correct matching of specific auscultatory findings (List I) with their corresponding cardiac conditions (List II) to identify distinct cardiac pathologies.
Understanding the Cardiovascular Sound Matches
- Finding A: Wide fixed split in the second heart sound corresponds to Condition 2: Atrial Septal Defect (ASD). The fixed split occurs because the increased right atrial volume in ASD equalizes right ventricular and pulmonary artery pressures, delaying pulmonic valve closure consistently across respiratory cycles.
- Finding B: Continuous machinery murmur is characteristic of Condition 3: Patent Ductus Arteriosus (PDA). This murmur is heard throughout systole and diastole due to the continuous pressure gradient between the aorta and the pulmonary artery, allowing blood to shunt from the aorta to the pulmonary artery.
- Finding C: Muffled heart sounds relates to Condition 4: Pericardial Effusion. Excess fluid in the pericardial sac dampens the transmission of heart sounds, making S1 and S2 less distinct and quieter.
- Finding D: Wide variable split in the second heart sound is associated with Condition 1: Pulmonary Hypertension. Increased pulmonary artery pressure can prolong right ventricular systole, leading to delayed pulmonic valve closure and a split S2 that varies with respiration.
Summary of Correct Pairings
| List I Auscultatory Finding | List II Cardiac Condition |
| A: Wide fixed split S2 | 2: Atrial Septal Defect |
| B: Continuous machinery murmur | 3: Patent Ductus Arteriosus |
| C: Muffled heart sounds | 4: Pericardial Effusion |
| D: Wide variable split S2 | 1: Pulmonary Hypertension |
The correct matching derived from the analysis is A-2, B-3, C-4, and D-1.
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