Heart Block

Heart Block

Electrical impulses start normally in the SA Node but are delayed, interrupted or terminated below the atrium, which would cause a delayed or missed ventricle contraction. Heart blocks are identified by three degrees of severity and can be permanent or transient.


An arrhythmia (ah-RITH-me-ah) is any abnormal electrical activity in the heart.


  • An arrhythmia happens when some part of the heart's electrical system doesn't function as it should.
  • Most arrhythmias are harmless, but some can be serious or even life threatening.
  • Millions of Americans have arrhythmias, which are more common among older individuals.
  • Arrhythmias have many causes. Heart disease is a common cause of serious arrhythmias. Stress, smoking, heavy alcohol use, heavy exercise, some drugs (such as cocaine or amphetamines), and some medicines can lead to arrhythmias in some people.


  • Palpitations (an unpleasant feeling that your heart is skipping beats or beating too hard).
  • A fast or racing heartbeat, a slow heartbeat, or an irregular heartbeat.
  • Weakness, dizziness, light-headedness, sweating, and fainting.
  • Shortness of breath
  • Chest pain
  • Anxiety


If a standard ECG test does not detect an arrhythmia, your doctor may have you wear a portable heart monitor that can record the heartbeat for a longer period of time. Your doctor may prescribe any of three types of ambulatory cardiac monitors that are useful in detecting arrhythmias that come and go.

Holter monitor

This small, portable device records the heart's electrical activity continuously over a 24 to 48 hour period.

Event monitor

Event monitors are useful to diagnose arrhythmias that only occur once in a while. The small, portable device is worn continuously for up to 30 days, and it records the heart's electrical activity when you push a button on the device.

Mobile Cardiac Telemetrya

Mobile Cardiac Telemetry (MCT) is the latest technology in ambulatory cardiac monitoring. Like an event monitor, MCT is useful to diagnose arrhythmias that only occur once in a while. It is a small, portable heart monitoring system that can automatically capture and transmit your heart’s abnormal activity, to a cardiac monitoring center, even if you don’t feel a symptom.


Common arrhythmia treatments include medicines, medical procedures, and surgery. Treatment is needed when an arrhythmia causes serious symptoms, such as dizziness, chest pain, or fainting, or when it increases your chances of developing complications, such as heart failure, stroke, or sudden cardiac death.

Serious arrhythmias can often be successfully treated. Most people with arrhythmias are able to live normal lives.