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Interpret the ECG
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Reading File
Here is a full interpretation of this ECG:
ECG Interpretation
Patient: 67 years old | Exam: United Hospital | Date: 9 July 2026, 09:59 AM
Physician: Dr. Prasanna Kumar K.S.
Automated Measurements
| Parameter | Value | Normal Range |
|---|---|---|
| Heart Rate | 77 bpm | 60-100 bpm |
| PR Interval | 170 ms | 120-200 ms |
| QRS Duration | 86 ms | <120 ms |
| QT / QTc | 362 / 394 ms | QTc <440 ms |
| P axis | 16° | 0-75° |
| QRS axis | 27° | -30° to +90° |
| T axis | 40° | 0-90° |
| RV5 + SV1 | 2.15 mV | <3.5 mV |
Rhythm Analysis
- Rhythm: Normal Sinus Rhythm
- Every P wave is followed by a QRS complex with a constant PR interval
- P waves are upright in I, II, aVF and inverted in aVR - consistent with sinus origin
- Rate is regular at 77 bpm
Axis
- Normal axis at +27° - falls well within the normal quadrant
- QRS is upright in both lead I and lead aVF
Intervals
- PR interval (170 ms): Normal - no AV block, no pre-excitation
- QRS duration (86 ms): Normal - no bundle branch block
- QTc (394 ms): Normal - no prolongation, no risk of Torsades
Waveform Analysis by Lead Group
Limb leads (I, II, III, aVR, aVL, aVF):
- Upright P waves in I, II, and aVF - normal sinus morphology
- No pathological Q waves
- No ST elevation or depression
- T waves upright in I, II, aVF; flat/inverted in III (normal variant)
- aVR shows inverted P, negative QRS, and inverted T (all normal)
Precordial leads (V1-V6):
- Normal R-wave progression: rS in V1-V2, transitional zone at V3, dominant R from V4 onwards
- No poor R-wave progression (argues against anterior MI or cardiomyopathy)
- No ST-segment changes in any precordial lead
- T waves upright V1-V6
- RV5+SV1 = 2.15 mV, which is below the Sokolow-Lyon threshold of 3.5 mV - no LVH by voltage criteria
Summary Interpretation
Normal ECG
This is a normal 12-lead ECG in a 67-year-old patient. There are no features of:
- Myocardial ischemia or infarction (no ST changes, no pathological Q waves)
- Conduction abnormality (normal PR and QRS durations)
- Ventricular hypertrophy (voltage criteria not met)
- Arrhythmia
- QT prolongation
The automated machine interpretation ("** normal ECG **") is concordant with this manual analysis.
Note: This ECG interpretation is for clinical reference. Final diagnostic decisions should always be correlated with the patient's clinical presentation, symptoms, and history. The report is marked "Unconfirmed" - it requires physician sign-off.
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