The RES system [31]
| ECG criteria | Points |
|---|---|
Voltage criteria (any of): 1. R or S in limb leads ≥ 20 mm 2. S in V1 or V2 ≥ 30 mm 3. R in V5 or V6 ≥ 30 mm | 3 |
ST-T abnormalities: 1. ST-T vector opposite to QRS without digitalis 2. ST-T vector opposite to QRS with digitalis | 3 1 |
| Indicates of LA hypertrophy: negative terminal P in V1 exceeding 1 mm in depth and 40 ms in duration | 3 |
| Left axis deviation (QRS of –30 or more) | 2 |
| QRS duration ≥ 90 ms | 1 |
| Delayed or intrinsic deflection in V5 or V6 (> 50 ms) | 1 |
4 points—probable LVH > 5 points—diagnosis of LVH | |
P: P wave of ECG; ST-T: ST segment and T wave
BN, KWD, and ET: Methodology. BN, AG, and RN: Investigation. RN, BN, TR, ET, MK, PL, JDK, and KWD: Formal analysis. BN, RN, AG, TR, ET, MK, PL, JDK, and KWD: Writing—original draft.
The authors declare that they have no conflicts of interest.
This manuscript complies with the Declaration of Helsinki. The research was conducted with the approval of the Bioethics Committee of the Medical University of Lodz number RNN/31/16/KE.
Informed consent to participate in the study was obtained from all participants.
Informed consent to publication was obtained from all participants.
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© The Author(s) 2023.