Specialist expertise: Breathlessness, Cardiovascular CT Scans, Cardiac CT, Cardiac Imaging, Cardiology, Chest Pain, Hypertension, Palpitations.
There are several possible underlying causes of the fast abnormal heart rhythms that cause cardiac arrest. The most common reason is coronary disease, a narrowing of the arteries that supply the heart, including sudden blockages that cause a heart attack. This can then cause these unstable cardiac rhythms. Coronary disease is the most common cause of cardiac arrest over the age of 35.
Most people who have a cardiac arrest under the age of 35 have abnormal hearts because of conditions that they have been born with. These are often undetected. Conditions include cardiomyopathies (diseases of the heart muscle), electrical abnormalities, heart valve disease and an abnormal position of one of coronary arteries (one of the blood vessels supplying blood to the heart).