Underlying structural heart disease is generally absent.  Often, there is no precipitant of an episode.<unk>  factors for precipitation of AVNRT include: Alcohol, anemia, anxiety, caffeine, chocolate, fever, hyperthyroidism, hypokalemia, hypomagnesemia, hypoxia, myocardial ischemia, menstruation, psychological stress, pulmonary embolism, stimulants, tea, theobromine in foods like tea, coffee and chocolate, and theophylline.
Supraventricular tachycardia risk factors
Atrial flutter risk factors
Ventricular fibrillation risk factors
AVNRT risk factors
Pulseless ventricular tachycardia risk factors
Premature atrial contraction risk factors
ST elevation myocardial infarction risk factors
Wide complex tachycardia risk factors