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What is J point in ECG?

From American Heart Association www.circ.ahajournals.org/cgi/content/full/98/18/1937 The J 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 10 milliseconds. The J point may deviate from the baseline in early repolarization, epicardial or endocardial ischemia or injury, pericarditis, right or left bundle-branch block, right or left ventricular hypertrophy, or digitalis effect. The term J deflection has been used to designate the formation of the wave produced when there is a large, prominent deviation of the J point from the baseline. The J deflection has been called many names, including camel-hump sign, late delta wave, J-point wave, and Osborn wave. The prominent J deflection attributed to hypothermia was first reported in 1938 by Tomaszewski. The wave was observed by others, including Kossmann,Grosse-Brockhoff and Schoedel, Bigelow et al, Juvenelle et al, and Osborn. Over the years, the unusual wave increasingly has been called an Osborn wave (Figure 4B ), probably because of Osborn's excellent article written in 1953. Clinicians labeled the deflection an Osborn wave in honor of Osborn, one of the first American Heart Association research fellows. Much has been written about the abnormal J deflection observed in patients with hypercalcemia. Other conditions have been reported to cause an abnormal J deflection, including brain injury, subarachnoid hemorrhage, damage to sympathetic nerves in the neck, and cardiopulmonary arrest from oversedation. Brugada and Brugada reported patients with right bundle-branch block who exhibited noncoronary ST-segment elevation in the right precordial leads and experienced ventricular tachycardia or ventricular fibrillation. A controversy now surrounds this condition because not all of the tracings show classic right bundle-branch block, and some patients might have arrhythmogenic right ventricular dysplasia. All J-wave deflections do not look alike. Some are merely elevations of ST segments in leads V1 and V2, whereas others are of the spike-and-dome variety. This leads to the conclusion that different mechanisms may be responsible for the size and shape of J-wave deflections.


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A word that joins is a conjunction.


What is a word that joins clauses?

What is the word that joins clauses called


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Adenine joins with Thymine, Guanine joins with Cytosine


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A word that joins a word is a conjunction


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The joins in the skull are known as 'Sutures'.


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When you mix colors, you are engaging with the properties of light and how our eyes perceive it. Colors change when mixed because they combine to create new wavelengths of light. This blending of different wavelengths results in our eyes detecting a new color that is a combination of the colors mixed together.


What joins island and mainland?

A bridge or a ferry typically joins an island with the mainland.


What is the duration of Fatty Joins the Force?

The duration of Fatty Joins the Force is 720.0 seconds.


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The word that joins or connects sentences or clauses in writing is a conjunction, such as "and," "but," or "or."


What is the word that joins to simple sentences?

The word that joins two simple sentences is a conjunction.


What is the duration of Francis Joins the WACS?

The duration of Francis Joins the WACS is 1.58 hours.