Clinical Examination Summary
Diastolic Murmurs:
Pathophysiology: Occurs during ventricular relaxation; often indicates pathologies like aortic or pulmonic regurgitation and mitral or tricuspid stenosis.
Clinical Signs: Characterized by early, mid, or late diastolic timing, pitch, and associated symptoms such as wide pulse pressure or right atrial enlargement​(diastolic murmurs).
Functional Murmurs:
Etiology: Non-pathological, often due to increased blood flow in states like pregnancy or hyperthyroidism.
Characteristics: Typically soft and non-radiating; includes types like Still’s murmur and mammary souffle​(functional murmurs).
Pericardial Rub:
Cause: Commonly due to pericarditis, recognized by a scratchy sound caused by inflamed pericardial layers.
Key Signs: Loudest over the left sternal border and varies with positioning, often becoming louder when the patient leans forward​(pericardial rub).
Systolic Flow Murmurs:
Pathophysiology: Associated with increased cardiac output; common in states like anemia and pregnancy.
Distinguishing Factors: Generally soft, mid-systolic, and less intense than pathologic murmurs​(systolic flow murmurs).
Systolic Murmurs:
Types: Includes ejection and holosystolic murmurs. Conditions such as aortic stenosis and mitral regurgitation are common causes.
Clinical Relevance: Differentiation from physiological murmurs is essential to diagnose underlying pathologies​(systolic murmurs).
Vascular Clicks:
Classification: Divided into valvular and vascular clicks, each with unique characteristics and timing.
Clinical Importance: Useful in identifying conditions like mitral valve prolapse and bicuspid aortic valve​(vascular clicks).
Cardiac Clicks:
Association: Often related to mitral valve prolapse and other valvular abnormalities.
Characteristics: High-pitched, occurring primarily in mid- or late systole, and changes with position​(clicks).
Continuous Murmurs:
Mechanism: Due to persistent pressure gradient, as in patent ductus arteriosus or arteriovenous fistulas.
Types: Notable examples include PDA, AV fistulas, and venous hums​(continunous murmur).