Chamber hypertrophy

Left ventricular hypertrophy အတွက် criteria မျိုးစုံရှိပါတယ်။
Left ventricular hypertrophy
ECG criteria — There have been multiple ECG criteria proposed for diagnosing LVH. The most popular include:
• Sokolow and Lyon — Amplitude of S wave in lead V1 + amplitude of R wave in V5 or V6 (whichever is the tallest) ≥35 mm.
• Cornell — Amplitude of R wave in aVL + amplitude of S wave in V3 >28 mm for men, or >20 mm for women.
• Roberts — QRS voltage in all leads >175 to 225 mm.
• Scott —
Limb leads:
R in I + S in 3 more than 25 mm
R in aVL more than 11 mm or >18 mm if left axis is present
R in aVF more than 20 mm
S in aVR more than 14 mm
Chest leads:
S in V1 or V2 + R in V5 or V6 more than 35 mm
R in V5 or V6 more than 26 mm
R + S in any V lead more than 45 mm

Among the most specific (although not sensitive) criterion is the amplitude of the R wave in lead aVL; LVH is present when this is greater than 11 mm (or 18 mm in the presence of left axis deviation).

အဲ့ထဲမှာမှ Sokolow and Lyon ကတော့ အပြောများပါတယ်။ အောက်ဆုံးက specfic ဖြစ်တယ်ဆိုတဲ့ aVL က အချက်ကိုလည်း မှတ်စေချင်ပါတယ်။

Right ventricular hypertrophy
• Right axis deviation (>+90)
• R in V1 >6 mm
• R/S ratio in V1 >1
• R in V1 + S in V5 or V6 >10.5 mm
• S/R ratio in V6 >1
• ST/T abnormalies in inferior leads

အပေါ်ဆုံး ၃ ချက်လောက်တော့ မှတ်စေချင်ပါတယ်။

atrial hypertrophy တွေကိုတော့ အောက်ကပုံမှာပါတဲ့ morphology ကိုမှတ်ပေးပါ။