ecg abdullah sir

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kamrul

dr. arif

left atrial enlargement is earliest sign of HTN

dr. arif

ECG criteria for LVHThere are several sets of criteria used to diagnoseLVH via electrocardiography. [3] None of them isperfect, though by using multiple criteria sets, thesensitivity and specificity are increased.The Sokolow-Lyon index: [4][5]S in V1 + R in V 5 or V6 (whichever is larger) ≥35 mm (≥ 7 large squares)R in aVL ≥ 11 mmThe Cornell voltage criteria [6] for the ECGdiagnosis of LVH involve measurement of the sumof the R wave in lead aVL and the S wave in leadV 3. The Cornell criteria for LVH are:S in V3 + R in aVL > 28 mm (men)S in V3 + R in aVL > 20 mm (women)The Romhilt-Estes point score system("diagnostic" >5 points; "probable" 4 points):ECG Criteria PointsVoltage Criteria (any of):1. R or S in limb leads ≥20 mm2. S in V1 or V2 ≥30 mm3. R in V5 or V6 ≥30 mm3ST-T Abnormalities:ST-T vector opposite to QRS withoutdigitalisST-T vector opposite to QRS withdigitalis31Negative terminal P mode in V1 1 mm indepth and 0.04 sec in duration (indicatesleft atrial enlargement )3Left axis deviation (QRS of -30° or more) 2QRS duration ≥0.09 sec 1Delayed intrinsicoid deflection in V 5 or V6(>0.05 sec)1Other voltage-based criteria for LVH include:Lead I: R wave > 14 mmLead aVR: S wave > 15 mmLead aVL: R wave > 12 mmLead aVF: R wave > 21 mmLead V 5: R wave > 26 mmLead V 6: R wave > 20 mm