There is no correlation between slow heartbeat and cold. Slow heartbeat is clinically known as bradycardia, which includes sinus bradycardia, sinus atrioventricular block, atrioventricular block and sinus arrest. These conditions are arrhythmic disorders caused by diseases of the heart’s conduction system, which result from problems with the origin of cardiac excitation and conduction pathways. The majority of colds are upper respiratory tract infections caused by viral infections (which can be combined with bacterial infections). There is no definite correlation between the two. Bradycardia can cause symptoms such as dizziness, blackouts, and in severe cases, fainting, while colds are usually characterized by nasal congestion, coughing, dizziness, and muscle aches and pains. When slow heartbeat is detected, you should go to the hospital in time to avoid delaying the treatment of your condition.