first heart sound meaning in Hindi

Examples

1. The closing of the mitral valve and the tricuspid valve constitutes the first heart sound ( S1 ).
2. As the ventricular systole begins, pressure within the ventricle rises and the AV valve closes producing the'first heart sound'( S 1 ).
3. The first heart sound may be followed by a sharp ejection sound ( " ejection click " ) best heard at the lower left sternal border and the apex, and, thus, appear to be " split ".
4. Findings on clinical examination depend on the severity and duration of MI . The mitral component of the first heart sound is usually soft and with a laterally displaced apex beat, often with P 2, heard best when lying on the left side.