S,: Character of auscultation )Area: loudest at the basic 2) Pitch个 3)Lasting timev
• S2 : Character of auscultation 1) Area: loudest at the basic 2) Pitch 3) Lasting time
The differentiate between S, S 1)S, apex pitch l, lasting time basi, pitch个 lasting time↓ 2)Duration: SS2 s2 S 3)Apical pulse
• The differentiate between S1~S2 1) S1 apex pitch , lasting time S2 basic, pitch lasting time 2) Duration: S1 __S2 S2 __S1 3) Apical pulse
3: Mechanism In early diastole filling blood moves from atrium to ventricle. Produces the vibration of ventricle wall Character: at apex or superinternal of apex 0.12~0.18" after S2 frequency v intensity S: Occur late in diastole. with effective atrial contraction 0 11 prior to SI
• S3 : Mechanism: In early diastole filling blood moves from atrium to ventricle, Produces the vibration of ventricle wall • Character: at apex or superinternal of apex 0.12~0.18'' after S2 frequency intensity • S4 : Occur late in diastole, with effective atrial contraction 0.11'' prior to S1
4. Abnormal of heart sound Change in loudness Both s and s2 个: Thinner chest wall Activity of the heart increased v. Fat edema Pericardial effusion heart failure
4. Abnormal of heart sound • Change in loudness Both S1 and S2 : Thinner chest wall Activity of the heart increased : Fat, edema, Pericardial effusion, heart failure
Change in S S depends on: myocardial contraction filling degree of ventricle elastic and position of the valve ST: 1)MS 2) Tachycardia: in high fever, the diastolic period was shortened
• Change in S1 : S1 depends on: myocardial contraction filling degree of ventricle elastic and position of the valve S1: 1) MS 2) Tachycardia: in high fever, the diastolic period was shortened