It is being done during the physical examination for knowing the sign of cardiovascular pathology.
Cardiac cycle: Serial blood flow also known as serial circulation:
From all body to right atrium to right ventricle to lungs to left atrium to left ventricle
heart sounds during the cycle
Other physiological heart sounds s3 and s4, these can only be heard through phonocardiogram in:
Closure of valves in phases of the cardiac cycle
Events during cardiac cycle
PMI: Point of maximal inspection: the site where maximum beat can be heard it is present in 5th intercostal space at the midclavicular line(9cm from mid sternum).
Cardio-Thoracic ratio: it shows the position of the heart and its size in the chest cavity with the help of a chest X-ray of a person.
*Abnormal heart sounds or heart murmurs
it can be due to the
Types of abnormal heart sounds:
It is of three types;
Gradation of heart sounds
–Continuous heart sounds are heard in Patent ductus arteriosis
*Contraction of ventricles
Hypertrophy: Increase in size of the heart.
Types: There are two types depending upon the diameter of the ventricular cavity.
It can be in atria or ventricle.
1.Atrial premature contraction
ii.Ventricular premature contraction