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Note: the mean QRS Vector & Vent Hypertrophy Can't be accurately calc. in the presence of B.B.B. Left Ventricular Hypertrophy: - Criteria/Definition / Left Ventricular Strain Pattern (V5) / Ventricular Strain causes depressed ST segment __/ _ __ which curves upward in the middle of the segment _ / _/ * Note: Left Chest Leads: Long and Gradual Inversion of T Waves w/ Rapid Normalization; * Note: May have QS in V1-V4; * w/ IHSS: may have q waves in Inferolateral leads Criteria for LVH ( > 35 years of age): Note: the mean QRS Vector and Ventricular Hypertrophy Can't be accurately calculated in the presence of B.B.B. - S wave in V1 or V2 + R wave in V5 or V6 >35 mm; - R wave in AVL > 11 mm, or ... - R wave in I + S wave in III > 25 mm; or... - R wave in V5 or V6 > 26 mm - QRS may be > 0.1 sec wide in V5 and V6; - ST segment depression & T wave inversion in V5 or V6; / Left Ventricular Strain Pattern (V5) / Ventricular Strain causes depressed ST segment __/ _ __ which curves upward in the middle of the segment _ / _/ Note: Left Chest Leads: Long and Gradual Inversion of T Waves w/ Rapid Normalization; / Left Ventricular Strain Pattern (V5) / Ventricular Strain causes depressed ST segment __/ _ __ which curves upward in the middle of the segment _ / _/ Note: Left Chest Leads: Long and Gradual Inversion of T Waves w/ Rapid Normalization;