bradycardia symptomshypomagnesemia and hypokalemiatachycardia and bradycardiasupraventricular bradycardiahypotension and bradycardiabradycardia arrhythmiahypothyroidism and bradycardiasymptomatic bradycardiabradycardia with hypertensionhyperkalemia bradycardiahypokalemia acidosisamiodarone bradycardia