Patient & Technical Details

Measured Intervals

Machine Diagnosis

Sinus Rhythm — Normal ECG

Systematic Manual Review

Rhythm

• Regular sinus rhythm at 67 bpm. P waves are present and upright in leads I, II, and precordial leads — confirming sinoatrial origin.
• Normal PR interval (146 ms) — no AV block, no pre-excitation.

Conduction

• QRS duration is 100 ms — borderline upper normal but not meeting criteria for bundle branch block (<120 ms required). No slurring, no delta waves.

Axis

• P-axis and QRS axis both within normal limits. No left or right axis deviation.

Waveform Morphology

• P waves: Normal morphology in all leads.
• QRS: Narrow. Normal R-wave progression across precordial leads (V1→V6).
• ST segments: No pathological ST elevation or depression visible.
• T waves: Upright in expected leads; no significant inversion.
• QTc 402 ms: Normal, no prolonged QT.

LVH Assessment

• RV5 (1315 mV) + SV1 (837 mV) — using Sokolow-Lyon index: 1315 + 837 = 2152 mV (21.52 mm). Threshold for LVH is >35 mm — no LVH by voltage criteria.

Conclusion

• Sinus rhythm, rate 67 bpm
• All intervals within normal limits
• Normal axis
• No ischemia, no conduction abnormality, no hypertrophy
• Borderline QRS at 100 ms — clinically insignificant in a young, healthy individual

⚕️ Disclaimer: This is an educational/informational ECG analysis. All clinical decisions must be made by a qualified physician in the context of the full clinical picture.