Final answer:
In constrictive pericarditis, the classic auscultatory finding is Pericardial Knock.
Step-by-step explanation:
In constrictive pericarditis, the classic auscultatory finding is Pericardial Knock.
In this condition, the pericardium (the sac surrounding the heart) becomes thick and rigid, leading to impaired filling of the heart chambers. As a result, a characteristic sharp sound called the Pericardial Knock is heard during diastole, when the heart is relaxed and filling with blood.
This sound is caused by the sudden cessation of blood flow due to the stiffened pericardium suddenly stopping the rapid filling of the ventricles.