…valve into the main pulmonary artery. Depending on the size and form of the thrombus, it will occlude the main pulmonary artery or its branches…

…to more branches, and thus more myocardium, as compared with a distally located thrombus. The duration of the ischemia: the longer the duration of the…

…obstruction) of the left main coronary artery (LAD) or 2 epicardial coronary arteries (Felker et al). Left ventricular dilation entails a markedly elevated risk of…

…presumably the main cause of left ventricular dysfunction among patients with atrial fibrillation and other supraventricular tachyarrhythmias. Moreover, ventricular tachyarrhythmias (including recurrent episodes of ventricular…

…of the flow. The main factors determining E wave velocity and form are the following: The pressure gradient between the left atrium and the left…

…beats/min is most likely not paced. An intrinsic heart rate faster than the base rate should inhibit the pacemaker. P waves The appearance of…

…lead V1 and qRS pattern in V6 with QRS duration <120 ms) D: Profound sinus bradycardia (<30 beats/min or sinus pauses ≥3 s) Explanation…

…V6. The electrical axis should be −30° to 90°. Normal values and differential diagnoses Prolonged QRS duration: left bundle branch block. Right bundle branch block…

…or unknown duration An anticoagulant for at least 3 weeks before cardioversion, or alternatively transoesophageal echocardiography to exclude thrombus After cardioversion, irrespective of duration An…

…complexes (QRS duration ≥0,12 s) : ventricular tachycardia is the most common cause and it is potentially life threatening. Note that 10% of wide complex…