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What is The first hea sound is loud in which of the following conditions? 1. Mitral regurgitation 2. Pregnancy 3. Anemia 4. Mitral stenosis and explain in detail?
Loud S1-Tachycardia Sho PR interval CHF Anemia Pheochromocytoma Thyrotoxicosis Physiological: Children /pregnancy In Mitral stenosis-Physical obstruction- | Left atrial pressure S1 becomes softer in - Later stages of MS when the leaflets are rigid and calcified After exposure to beta adrenergic receptor blockers - Long PR intervals - left ventricular contractile dysfunction