test ®iÖn tim ®å • LVH & PVCs: Precordial Leads-KH • Left Atrial Enlargement-KH • Left atrial enlargement is illustrated by increased P wave duration in lead II, top ECG, and by the prominent negative P terminal force in lead V1, bottom tracing II V1 • LVH - Best seen in the frontal plane leads!-KH Lewis Index: 1) R in aVL >11 mm 2) R in I + S in III >25mm 3) (RI+SIII) - (RIII+SI) >17mm • Right Atrial Enlargement (RAE) & Right Ventricular Hypertrophy (RVH)-KH • RAE is recognized by the tall (>2.5mm) P waves in leads II, III, aVF. RVH is likely because of right axis deviation (+100 degrees) Left Atrial Abnormality & 1st degree AV Block-KH Sóng P rộng (>0,12s) và có khía ở DII, DIII; hai pha ở chuyển đạo V1 Tất cả các tiêu chuẩn cho nhĩ trái không bình th ờng hoặc dầy nhĩ (LAE). Khoảng PR > 0,2s: Block AV cấp I. • Severe RVH - Trôc P râ (+150 degrees) - D¹ng qR ë V1, R/S ë V1 > 1; S/R ë V6 > 1 - ST chªnh dèc xuèng ë c¸c chuyÓn ®¹o tr íc tim ph¶i • LVH: Limb Lead Criteria-KH • In this example of LVH, the precordial leads don't meet the usual voltage criteria or exhibit significant ST segment abnormalities. The frontal plane leads, however, show voltage criteria for LVH and significant ST segment depression in leads with tall R waves. The voltage criteria include 1) R in aVL >11 mm; 2) R in I + S in III >25mm; and 3) (RI+SIII) - (RIII+SI) >17mm (Lewis Index). • Left Atrial Enlargement: Leads II and V1-KH • RAE & RVH-KH . in lead V1, bottom tracing II V1 • LVH - Best seen in the frontal plane leads!-KH Lewis Index: 1) R in aVL > ;11 mm 2) R in I + S in III >25mm 3) (RI+SIII) - (RIII+SI) > ;17 mm • Right. Khoảng PR > 0,2s: Block AV cấp I. • Severe RVH - Trôc P râ ( +15 0 degrees) - D¹ng qR ë V1, R/S ë V1 > 1; S/R ë V6 > 1 - ST chªnh dèc xuèng ë c¸c chuyÓn ®¹o tr íc tim ph¶i • LVH:. voltage criteria include 1) R in aVL > ;11 mm; 2) R in I + S in III >25mm; and 3) (RI+SIII) - (RIII+SI) > ;17 mm (Lewis Index). • Left Atrial Enlargement: Leads II and V1-KH • RAE & RVH-KH