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