You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Myocardial stunning pattern' in ECG, which mimics myocardial infarction? and explain in detail?
(A) Takotsubo cardiomyopathy[?]"Myocardial Stunning" is a condition where certain segments of myocardium (corresponding to area of major coronary occlusion) shows forms of contractile abnormality.oSegmental dysfunction persisting for a variable period of time, about 2 weeks, even after ischemia has been relieved (by for Instance Angioplasty or Coronary Artery Bypass Surgery).oTakotsubo cardiomyopathy or Takotsubo syndrome, is a temporary condition where the heart muscle becomes suddenly weakened or 'stunned'.oSymptoms of Takotsubo (stress-related) cardiomyopathy often start abruptly with chest pain & shortness of breath.oThis cardiomyopathy, is triggered by an emotionally or physically stressful event & may mimic acute MI.oAssociated ECG abnormalities: ST-segment elevation & elevated biomarkers of myocardial injury.Other Options[?]Restrictive Cardiomyopathy:-It is dominated by abnormal diastolic function, often with mildly decreased contractility & ejection fraction (usually >30-50%).-Seen in Amyloidosis, sarcoidosis, hemochromatosis etc.,-Ventricles become rigid & lack the flexibility to expand during diastole.-SOB, fatigue, palpitations & syncope.-Other Common Findings: Atrial fibrilation, conduction delays.-ECG shows Low voltage, non-specific ST-T wave abnormalities & various arrhythmias.[?]Brugada byndrome:-ECG shows >0.2mV of ST-segment elevation with coved ST segment & negative T wave in more than one anterior precordial lead (V1 -V3 ) and episodes of syncope or cardiac arrest due to polymorphic VT in the absence of structural heart disease.-Cardiac arrest may occur during sleep or be provoked by febrile illness.-Males are more commonly affected than females.-Quinidine used successfully to suppress frequent episodes of VT[?]Pericardial Effusion:oClassical triad of findings for pericardial effusionowith cardiac tamponade:-Sinus tachycardia,-Low QRS voltage,-Electrical alternans (Best seen in V3 & V4 )