* A condition in which the electric conduction of nerve impulses to specialized muscles in the heart is slowed or interrupted. 2
** A heart rate that's "too slow" is called bradycardia. What's "too slow" depends upon a person's age and physical activity. 3
Resources:
1 Cohen, Anna S., MRCP, PhD; Matharu, Manjit S. MRCP, PhD; Goadsby, Peter J. MD, PhD, DSc. “Electrocardiographic abnormalities in patients with cluster headache on verapamil therapy.” Neurology® 2007;69:668–675.
2 “What Is a Heart Attack?” MyHeartCentral.com.
3 “What Are Arrhythmias?” American Heart Association.
4 Perkel, Jeffrey. "Cluster Headache Treatment Poses Cardiac Dangers." HealthDay. August 13, 2007.
5 "Verapamil for headaches may cause heart problems." Reuters Health. August 13, 2007.
Last updated August 14, 2007.
