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A short PR interval (of less than 120ms) may be associated with a Pre-excitation syndromes such as Wolff–Parkinson–White syndrome or Lown–Ganong–Levine syndrome, and also junctional arrhythmia like atrioventricular reentrant tachycardia or junctional rhythm. A variable PR interval may indicate other types of heart block. [citation needed]
The diagnosis of WPW occurs with a combination of palpitations and when an electrocardiogram (ECG) show a short PR interval and a delta wave. [3] It is a type of pre-excitation syndrome. [3] WPW syndrome may be monitored or treated with either medications or an ablation (destroying the tissues) such as with radiofrequency catheter ablation. [4]
Lown–Ganong–Levine syndrome (LGL) is a pre-excitation syndrome of the heart. Those with LGL syndrome have episodes of abnormal heart racing with a short PR interval and normal QRS complexes seen on their electrocardiogram when in a normal sinus rhythm .
In some cases, however, this pattern can facilitate certain arrhythmias, or basically make certain arrhythmias more severe and potentially even cause sudden cardiac death, in which case it would be called Wolff-Parkinson-White syndrome. For example, people with atrial arrhythmias might have atrial rates in the 200 to 300 beats per minute range.
Sinus bradycardia is a sinus rhythm with a reduced rate of electrical discharge from the sinoatrial node, resulting in a bradycardia, a heart rate that is lower than the normal range (60–100 beats per minute for adult humans). [1] [2]
Nearly 90% of adults over age 20 in the United States are at risk of developing heart disease, an alarming new study suggests.. While the unexpectedly high number doesn't mean that the majority of ...
The U.S. Environmental Protection Agency authored a pamphlet in 1978 that suggested a correlation between low-birthweight (using the World Health Organization definition of less than 2,500 grams (88 oz)) and high sound levels, and also high rates of birth defects in places where expectant mothers are exposed to elevated sound levels, such as ...
Called multi-system inflammatory syndrome (MIS), this rare condition sets off severe inflammation in different parts of the body and can lead to critical health problems, long-term complications ...