Makindo Medical Notes"One small step for man, one large step for Makindo" |
|
---|---|
Download all this content in the Apps now Android App and Apple iPhone/Pad App | |
MEDICAL DISCLAIMER: The contents are under continuing development and improvements and despite all efforts may contain errors of omission or fact. This is not to be used for the assessment, diagnosis, or management of patients. It should not be regarded as medical advice by healthcare workers or laypeople. It is for educational purposes only. Please adhere to your local protocols. Use the BNF for drug information. If you are unwell please seek urgent healthcare advice. If you do not accept this then please do not use the website. Makindo Ltd. |
Related Subjects: Chronic Heart Failure |Heart Failure and Pulmonary Oedema |Loop Diuretics |Prosthetic Metal and Tissue Valves
Feature | Mitral Stenosis (MS) | Mitral Regurgitation (MR) |
---|---|---|
📖 Definition | Narrowing of the mitral valve opening ➝ restricted flow from LA → LV. | Incompetence of the mitral valve ➝ blood leaks back into LA during systole. |
⚠️ Etiology | 💉 Rheumatic heart disease (classic cause), congenital stenosis, severe annular calcification. | 🩺 Mitral valve prolapse, rheumatic disease, infective endocarditis, ischaemic papillary muscle dysfunction. |
🔬 Pathophysiology | ⬆️ LA pressure → pulmonary venous congestion → pulmonary hypertension → RV strain/failure. | Volume overload of LA + LV → chamber dilation → progressive LV dysfunction → HF. |
😮 Symptoms | Exertional dyspnoea, fatigue, palpitations (AF), orthopnoea, hemoptysis due to pulmonary venous hypertension. | Fatigue, exertional dyspnoea, orthopnoea, palpitations, peripheral oedema, PND. |
🔊 Heart Sounds | Loud S1, opening snap, low-pitched diastolic rumble (apex, left lateral position). | Soft S1, high-pitched pansystolic murmur at apex → radiates to axilla. |
⚡ Complications | AF, pulmonary hypertension, right HF, systemic emboli (AF-related). | AF, LV failure, pulmonary hypertension, progression to decompensated HF. |
🩻 Diagnostic Tools |
|
|
💊 Management |
|
|
💡 Exam tip: Mitral stenosis ➝ pressure overload (big LA, pulmonary HTN, AF). Mitral regurgitation ➝ volume overload (dilated LA + LV, eccentric hypertrophy). Always listen at the apex and think about radiation: diastolic rumble (MS) vs pansystolic to axilla (MR).