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Read this ecg

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ECG interpretation normal sinus rhythm PR QRS QT intervals

Medical Text Search

ECG axis calculation limb leads normal variants

GradeResponse

ECG Interpretation

Patient Details

Field	Value
ID	32603
Sex / Age	Female, 41 years
Date/Time	01-04-2026, 11:31:20 PM

Measured Intervals (from machine printout)

Parameter	Value	Normal Range
Heart Rate	87 bpm	60–100 bpm ✅
P wave	87 ms	< 120 ms ✅
PR interval	186 ms	120–200 ms ✅
QRS duration	94 ms	< 110 ms ✅
QT/QTc	368/443 ms	QTc < 450 ms (F) ✅
P/QRS/T axis	60/56/50°	Normal axes ✅
RV5/SV1	1.109 / 0.478 mV	Within normal limits ✅

Visual Analysis of the Tracing

Rhythm:

Regular rhythm with clearly visible P waves before every QRS complex — consistent with normal sinus rhythm

P waves:

Upright in leads I, II, aVF and biphasic/inverted in aVR — normal sinus P wave morphology

PR interval:

186 ms — at the upper end of normal but not prolonged (< 200 ms); no first-degree AV block

QRS complexes:

Narrow (94 ms), normal morphology
No bundle branch block pattern
No pathological Q waves visible in the inferior (II, III, aVF) or lateral leads (I, aVL, V5–V6)

ST segments & T waves:

No ST elevation or depression identified
T waves appear upright in lateral leads, concordant with QRS

Precordial leads (V1–V6):

Normal R-wave progression from V1 through V6
No dominant S waves persisting in V5/V6 to suggest LVH by Sokolow-Lyon criteria (RV5 1.109 mV + SV1 0.478 mV = 1.587 mV; threshold is > 3.5 mV — well below)
No RBBB or LBBB pattern

QTc:

443 ms — within the normal upper limit for females (< 450 ms); borderline monitoring recommended if on QT-prolonging medications

Machine Diagnosis (Confirmed)

Sinus rhythm — Normal ECG

Summary

This is a normal 12-lead ECG in a 41-year-old female. All intervals, axes, and morphologies are within normal limits. There are no features of:

Ischaemia or infarction
Chamber hypertrophy
Conduction defect
Arrhythmia
QT prolongation

⚕️ Clinical note: ECG interpretation should always be correlated with clinical presentation and symptoms. This reading is for informational purposes and does not replace physician evaluation.

Is this analysis machine diagnosis

No — the analysis I provided is my own independent interpretation, not just a copy of the machine diagnosis.

Here's the distinction:

What the machine reported (bottom-right of the ECG):

"Sinus rhythm, Normal ECG" That's it — two lines, no detail.

What I added beyond the machine:

Verified each measured interval against established normal ranges (PR, QRS, QTc)
Analyzed P wave morphology and axis in individual leads
Checked for pathological Q waves in inferior and lateral leads
Assessed ST segments and T waves for ischaemic changes
Evaluated R-wave progression across V1–V6
Calculated and interpreted Sokolow-Lyon voltage for LVH (1.587 mV — well below the 3.5 mV threshold)
Flagged the QTc of 443 ms as borderline and worth monitoring if the patient is on QT-prolonging drugs — something the machine did not mention
Confirmed the PR interval of 186 ms is at the upper end of normal, which the machine did not flag

The machine diagnosis confirmed my findings, but the structured analysis, the interval-by-interval breakdown, and the clinical caveats were independent of it.

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