The J point is a point in time marking the end of the QRS and the onset of the ST segment present on all ECG’s; the J wave is a much less common long slow deflection of uncertain origin originally described in relation to hypothermia. Benign early repolarisation (BER: AKA ‘high-take off; J-point elevation) is an ECG pattern most commonly seen in young, healthy patients < 50 years of age. Our progress would not be possible without our donor community. Early repolarization and sudden cardiac arrest: theme or variation on a theme? In this review, we discuss the current knowledge on the prevalence of different J-point/J-wave patterns and estimates of the magnitude of mortality and SCD risk associated with J-point elevations and J-waves, in what has become known as ER patterns.The J-point on the electrocardiographic waveform is historically defined as the junction between the end of the QRS complex and the beginning of the ST-segment.The variations in the electrocardiographic patterns of J-point elevations, and the complex of J-points and J-waves in ER, in conjunction with disparities in associated SCD risk, have lead to a recognition of the need to carefully classify the spectrum of these observations.The Brugada syndrome is characterized by a right bundle branch block pattern with ST-segment elevation and inversion of the terminal part of T-wave in the right precordial leads.The ECG patterns within the spectrum of the Brugada syndrome are classified into three categories (Brugada electrocardiography patterns. Osborn Waves. Vertical lines mark the J point (ST J) and the point 80 ms after the J point (ST 80) where the amplitudes of ST segment elevation are calculated

J point elevation can be seen in early repolarization. The term J-point elevation represents a family of ECG findings.

Search for other works by this author on: Help support our mission by giving today. However, an evaluation by an electrophysiologist would be a good idea and he could inform you of any new knowledge in this area.

The J point is the point where the ST segment starts. The magnitude of depression/elevation is measured as the height difference (in millimeters) between the J point and the PR segment. There are three types of ECG manifestations, referred to as type 1, type 2 and type 3 Brugada syndrome. Early repolarization is overrepresented among young males compared with females, but the higher prevalence in males declines rapidly during middle age. Research Resources

The J-point on the electrocardiographic waveform is historically defined as the junction between the end of the QRS complex and the beginning of the ST-segment.1,2 In 1953, Osborn3 described the presence of broad positive deflections originating from an elevated J-point, induced by experimental hypothermia and associated with ventricular fibrillation.

It has been described in several metabolic disorders most notably hypothermia (abnormally low body temperature). ECG with the classic features of hypothermia: bradycardia, Osborn waves and shivering artefact. Brugada syndrome subtypes are shown. Texas Heart Institute (Left) Typical Type I (coved type) Brugada syndrome electrocardiography pattern, (middle) Type II (saddleback) Brugada electrocardiography pattern, and (right) Type III Brugada electrocardiography pattern.

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