The patient's heart demonstrates ______ sounds, with a loud S3 followed immediately by S4, indicating severe heart failure.
1summation✓ 정답
2galloping
3splitting
4quadruple
5merged
해설
Summation gallop occurs when S3 and S4 heart sounds occur so close together that they merge into a single sound. This finding indicates severe diastolic dysfunction and is often heard in patients with advanced heart failure.
1. Normal Heart Sounds
- S1: Closure of mitral and tricuspid valves
- S2: Closure of aortic and pulmonic valves
2. Extra Heart Sounds
- S3: Early diastolic sound
- S4: Late diastolic sound
3. Summation Gallop
- Fusion of S3 and S4
- Occurs in severe heart failure
- Indicates poor ventricular compliance
- Associated with diastolic dysfunction
5. Auscultation Characteristics
- Best heard at apex
- Low-pitched sounds
- Increased intensity with left lateral position
- Timing: During diastolic phase
핵심 개념
summation — A condition where S3 and S4 heart sounds occur so close together that they merge into a single sound, indicating severe diastolic dysfunction
galloping — A type of abnormal heart rhythm characterized by three or four heart sounds that resemble the sound of a galloping horse
splitting — A condition where normal heart sounds (S1 or S2) are divided into two distinct components due to slight timing differences
quadruple — The presence of four distinct heart sounds in one cardiac cycle, typically including S1, S2, S3, and S4
merged — The combination of two or more heart sounds into a single sound, often referring to the fusion of different components of heart sounds