Isolated hyperkalemia may precipitate bradycardia, which, in turn, leads to renal failure. However, hyperkalemia does not generally cause bradycardia until the degree of hyper- kalemia is severe (e.g., potassium over 7 mEq/L) (1,10).

Does hyperkalemia cause bradycardia or tachycardia?

While less common than hypokalemia, hyperkalemia is often more dangerous and is associated with potentially lethal dysrhythmias such as ventricular tachycardia and ventricular fibrillation. Additional rhythm changes related to hyper- kalemia are sinus bradycardia, sinus arrest, and slow idioventricular rhythms.

Can hyperkalemia cause low heart rate?

More serious symptoms of hyperkalemia can include a decreased in heart rate and weak pulse. Severe hyperkalemia can lead to heart stoppage and death.