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Download 04 Lecture - 3 Cardiac Arrhythmia-2-25-2
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Transcript
Prof. Ashraf Husain Arrhythmia is defined as irregular impulse formation in the form of rate, conduction or change in interrelationship of timing of R-R interval Change slope Symp. Change thrashold Phase 4 change in slope. PS Change in RMP Atrial re-entry Atrial tachycardia Atrial fibrilation Atrial flutter AV Nodal re-entry Supraventricular tachycardias AV re-entry (Aberent) WPW synd. Supraventricular tachy Ventricular re-entry Ventricular tachycardias many go unnoticed and produce no symptoms palpitations - ranging from ³noticing´ or ³being aware´ of ones heartbeat to a sensation of the heart ³beating out of the chest´ if Q is affected (HR > 300) - lightheadedness and syncope, fainting drugs & electrolyte imbalances - antiarrhythmic drugs, hypokalemia,imbalances of calcium and magnesium very rapid arrhythmias u myocardial oxygen demand r ischemiaand angina sudden death - especially in the case of an acute MI‡mechanism differentiation from ECG very difficult to impossible
