Ventricular fibrillation clinical presentation

Cardiovascular Essential hypertension and electrocardiographic changes are present (ST-segment depression or flattening, T-wave inversion, and U-wave elevation). Clinical arrhythmias include heart block, atrial flutter, paroxysmal atrial tachycardia, ventricular fibrillation, and digitalis-induced arrhythmias. 

Other less frequent complications of lead extraction include arteriovenous fistulas that present either acutely or in the days following the procedure. Pericardial tamponade could be clinically evident several hours after the procedure. Patients undergoing lead extraction should be monitored for at least 24 h in the intensive care unit, with echocardiography performed electively immediately after the procedure and 6 h later to evaluate the pericardial space and tricuspid valve integrity. Life-threatening arrhythmias such as ventricular tachycardia, torsade de pointes, and ventricular fibrillation are rare but possible complications. 

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