We arrives on a side street two blocks away where there is a stretch of brick houses with high stoops and iron fences. View in context The firing died down and soldiers, talking eagerly, streamed out of a side street.
An irregular heartbeat is an arrhythmia (also called dysrhythmia). Heart rates can also be irregular. A normal heart rate is 50 to 100 beats per minute. Arrhythmias and abnormal heart rates don't necessarily occur together. Arrhythmias can occur with a normal heart rate, or with heart rates that are slow (called bradyarrhythmias -- less than 50 beats per minute).
Bradycardia, also known as bradyarrhythmia, is a slow heart rate, namely, a resting heart rate of under 60 beats per minute (BPM) in adults. It is a type of cardiac arrhythmia. It seldom results in symptoms until the rate drops below 50 BPM. It sometimes results in fatigue, weakness, dizziness, and at very low rates fainting. During sleep, a slow heartbeat with rates around 40â50 BPM is common, and is considered normal.