Bradycardia is a resting heart rate of under 60 beats per minute (BPM) in the context of adult medicine. However, Bradycardia is typically not symptomatic until the heart rate drops below 50 BPM. Typical symptoms of Bradycardia include weakness, fatigue, dizziness and fainting. Fainting though is typical in very low heart rates. In general there are 2 types of problems that result in bradycardia, disorders of the sinoatrial node (SA node), and disorders of the atrioventricular node (AV node). The California ACLS Training Institute offers more indepth knowledge on Bradycardia with pulse through ACLS Courses online.
Atrial Bradycardia is classified into three groups: 1) Respiratory Sinus Arrhythmia usually found in young health adults where heart rate increases during inhalation and decreases during exhalation, 2) Sinus Bradycardia common condition found in healthy individuals and athletes, and 3) Sick Sinus Syndrome
Atrioventricular nodal Bradycardia
Also known as AV junction rhythm is typically caused by the absence of an electrical impulse from the sinus node.
Also known as ventricular escape rhythm or idioventricular rhythm is a heart rate of less than 50 BPM.
This version of Bradycardia is found in infants where it is defined as less than 100 BPM. This condition is most often found in premature infants.