STEMI diagnosis. AVR Elevation. Posterior MI. Q wave diagnosis. Wide complex tachycardia. Hypokalemia. Digoxin toxicity. Na channel blockade. Syncope. Syncope risk stratification rules - San Francisco syncope rule / Canadian Syncope Rules. Bradycardia. ‘Trifascicular’ block. Pacemakers - The basics. Indications for pacemakers and ICD. Modes - VVI and DDD. Pacemaker Troubleshooting. Failure to Pace, Sense, Capture.