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J point is where qrs meets the st wave. J point elevation begins from the end of qrs and makes a concave up wave while a st elevation makes a convex down wave. J point elevation or notching is usually insignificant and cause for no concern
J point is situated in begging of st wave. J point elevation makes little notch an ST elevation has no notch in begging of ST wave
the ECG trace and the baseline at a point 0.24 seconds after the j point is at least 0.9 mV usually representing 1mm or 1 small square in a limb lead or 0.29 mV 2 mm or 2 small squares in a precordial leads.
J point is where qrs meets the st wave. J point elevation begins from the end of qrs and makes a concave up wave while a st elevation makes a convex down wave
