title: Re-entry--an important mechanism of cardiac arrhythmias.
mesh_terms: D000200:Action Potentials; D001145:Arrhythmias, Cardiac / Q000209:etiology*; D001281:Atrial Fibrillation / Q000209:etiology; D001283:Atrioventricular Node / Q000503:physiopathology; D002036:Bundle of His / Q000503:physiopathology; D005117:Cardiac Complexes, Premature / Q000150:complications; D006325:Heart Atria / Q000503:physiopathology; D006327:Heart Block / Q000503:physiopathology; D006329:Heart Conduction System / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology; D006439:Hemodynamics; D006801:Humans; D011690:Purkinje Fibers / Q000503:physiopathology; D012849:Sinoatrial Node / Q000503:physiopathology; D013614:Tachycardia, Paroxysmal / Q000503:physiopathology; D014693:Ventricular Fibrillation / Q000209:etiology; D014927:Wolff-Parkinson-White Syndrome / Q000503:physiopathology