Is J point elevation normal?

Is J point elevation normal?

J-point elevations and J-waves/early repolarization in athletes. These patterns have been observed in routine ECG recordings from asymptomatic athletes for many years and have been considered to be normal variants. It is still generally accepted that the most are indeed benign.

What causes J waves on ECG?

There are four principal causes of J waves, namely hypothermia, Brugada syndrome, early repolarization and hypercalcemia. Figure 1. Osborn wave (J wave). These waves occur due to hypothermia, hypercalcemia, early repolarization and Brugada syndrome.

What do J waves indicate?

The J waves seen in the first ECG appear to have represented the “current of injury” and seem to be indicative of severe ischemia in the territory of LCx. ECG recording of a normal cardiac cycle is composed of depolarization and repolarization.

What is a normal J point?

The J (junction) point in the ECG is the point where the QRS complex joins the ST segment. It represents the approximate end of depolarization and the beginning of repolarization as determined by the surface ECG. There is an overlap of around 10ms.

Is ST elevation injury or ischemia?

An acute ST-elevation myocardial infarction (STEMI) is an event in which transmural myocardial ischemia results in myocardial injury or necrosis.

What happens during ST elevation?

ST segment elevation occurs because when the ventricle is at rest and therefore repolarized, the depolarized ischemic region generates electrical currents that are traveling away from the recording electrode; therefore, the baseline voltage prior to the QRS complex is depressed (red line before R wave).

What does J wave indicate?

Abstract. The “J wave” (also referred to as “the Osborn wave,” “the J deflection,” or “the camel’s hump”) is a distinctive deflection occurring at the QRS-ST junction. In 1953, Dr. John Osborn described the “J wave” as an “injury current” resulting in ventricular fibrillation during experimental hypothermia.