IMG_20260714_114310005.jpg
Explain me ecg
Reading File
analyse_media
Here is a full explanation of this ECG belonging to Shaik Ayan, 17-year-old male, acquired on 14 July 2026.
ECG Report Summary
Patient & Technical Details
- Paper speed: 25 mm/s | Gain: 10 mm/mV (standard settings)
- These are normal calibration values, meaning the tracing is reliable to interpret.
Automated Measurements
| Parameter | Value | Normal Range | Status |
|---|---|---|---|
| Atrial Rate (AR) | 54 bpm | 60-100 bpm | Mildly slow |
| Ventricular Rate (VR) | 55 bpm | 60-100 bpm | Mildly slow |
| QRS Duration | 104 ms | <120 ms | Normal |
| QT Interval | 372 ms | <440 ms | Normal |
| Corrected QT (QTcB) | 356 ms | <450 ms (male) | Normal |
| PR Interval | 152 ms | 120-200 ms | Normal |
| P-R-T Axes | 57°/57°/51° | 0-90° normal axis | Normal |
Step-by-Step ECG Interpretation
1. Rhythm
Sinus rhythm - confirmed because:
- Every QRS is preceded by a P wave
- P waves are upright in leads I, II, aVF (normal sinus origin)
- P wave is inverted in aVR (expected and normal)
- Regular P-P and R-R intervals
2. Rate: Mild Sinus Bradycardia (54-55 bpm)
The rate is slightly below 60 bpm. In a 17-year-old male, this is almost certainly a normal physiological variant - commonly seen in:
- Young, fit, or athletic individuals (high vagal tone)
- Well-trained hearts at rest
There is NO evidence of heart block (PR interval is a normal 152 ms).
3. Cardiac Axis: Normal (57°)
- QRS is positive in both Lead I and Lead aVF → axis falls in the normal quadrant (0° to +90°)
- No left or right axis deviation
4. Limb Lead Waveforms
- Lead I: Low-amplitude positive QRS, upright P and T - normal
- Lead II: Classic normal appearance - upright P, tall R, upright T
- Lead III: Small positive QRS, flat T - normal
- aVR: Inverted P, negative QRS, inverted T - all expected and normal
- aVL: Isoelectric QRS, flat T - normal
- aVF: Positive P, positive QRS, positive T - normal
5. Precordial (Chest) Leads V1-V6
- V1-V2: rS pattern (small r, deep S) - normal for right-sided leads
- V3: Transition zone - RS pattern
- V4-V6: Progressively taller R waves, upright T waves
- R-wave progression: Normal - gradual increase from V1 to V6, as expected
6. Intervals
- PR = 152 ms - Normal (rules out pre-excitation like WPW and heart block)
- QRS = 104 ms - Normal (rules out bundle branch block, which requires >120 ms)
- QTc = 356 ms - Normal (rules out long QT syndrome)
What is NOT Present (Reassuring Findings)
- No ST elevation (rules out acute MI/STEMI)
- No ST depression (rules out ischemia)
- No pathological Q waves (rules out old infarction)
- No T-wave inversions (rules out ischemia or strain)
- No bundle branch block (QRS is narrow)
- No pre-excitation (PR is normal)
- No delta waves
Notable Observation: Baseline Artifact
There is mild muscle tremor/movement artifact (baseline noise/wobble) visible across limb leads - particularly in leads III and aVF. This is likely due to slight patient movement during recording. It does not obscure the main waveforms and does not represent a cardiac abnormality.
Overall Conclusion
This ECG is essentially normal for a 17-year-old male.
The only finding is mild sinus bradycardia (54-55 bpm), which is a benign, normal variant at this age - especially in a young healthy male with good cardiovascular fitness. All intervals, axis, morphology, and waveforms are within normal limits.
No acute or significant cardiac pathology is identified on this ECG.
Disclaimer: This is an educational ECG explanation and not a medical diagnosis. For clinical interpretation and management, please consult the cardiologist or physician who ordered this test.
IMG_20260714_114310005.jpg
EXPLAIN ECG
This is the same ECG I already analyzed in detail. Here is the full explanation again:
ECG Explanation - Shaik Ayan, 17M (14 Jul 2026)
What is an ECG?
An ECG (Electrocardiogram) records the electrical activity of the heart from 12 different angles (leads). Each lead gives a different "view" of the heart's electrical impulse as it travels from the top (atria) to the bottom (ventricles).
Measurements at a Glance
| Parameter | This ECG | Normal Range | Interpretation |
|---|---|---|---|
| Atrial Rate | 54 bpm | 60-100 bpm | Mildly slow |
| Ventricular Rate | 55 bpm | 60-100 bpm | Mildly slow |
| PR Interval | 152 ms | 120-200 ms | ✅ Normal |
| QRS Duration | 104 ms | < 120 ms | ✅ Normal (narrow) |
| QT Interval | 372 ms | < 440 ms | ✅ Normal |
| QTc (corrected) | 356 ms | < 450 ms (male) | ✅ Normal |
| P-R-T Axes | 57°/57°/51° | 0-90° | ✅ Normal axis |
The ECG Waveform - What Each Part Means
R
|
P | T
/\ | /\
--/ \--|---\---/ \--
| \ /
| S
Q
- P wave = atria (upper chambers) contracting to push blood into ventricles
- PR interval = electrical delay at the AV node (gives ventricles time to fill)
- QRS complex = ventricles (lower chambers) contracting to pump blood to lungs and body
- T wave = ventricles recovering (repolarizing) for the next beat
- QT interval = total time for ventricular activity (contraction + recovery)
Lead-by-Lead Findings
Limb Leads (I, II, III, aVR, aVL, aVF)
| Lead | Finding | Meaning |
|---|---|---|
| Lead I | Upright P, positive QRS, upright T | Normal |
| Lead II | Classic upright P, tall R, upright T | Normal sinus rhythm confirmed |
| Lead III | Small positive QRS, flat T | Normal |
| aVR | Inverted P, negative QRS, inverted T | Expected - mirror image lead |
| aVL | Near-isoelectric QRS, flat T | Normal |
| aVF | Upright P, positive QRS, upright T | Normal |
Chest (Precordial) Leads V1-V6
| Lead | Pattern | Meaning |
|---|---|---|
| V1 | Small r, deep S (rS) | Normal - right side of heart |
| V2 | rS pattern | Normal |
| V3 | RS transition | Normal transition zone |
| V4-V6 | Tall R waves, upright T | Normal - left side dominance |
R-wave progression: Gradual increase from V1 to V6 - this is normal and confirms no anterior wall damage.
Key Findings
1. Sinus Bradycardia (54-55 bpm)
The heart rate is slightly below 60 bpm. In Ayan's case (17-year-old male), this is completely normal - it is a sign of good cardiovascular health, high vagal tone, or physical fitness. The PR interval is normal (152 ms), ruling out any heart block.
2. Normal Cardiac Axis (57°)
The electrical direction of the heart is pointing normally downward-leftward. No axis deviation.
3. Normal QRS Width (104 ms)
A wide QRS (>120 ms) would indicate a bundle branch block. This is narrow - confirming normal conduction through the ventricles.
4. Normal QTc (356 ms)
QTc >450 ms in males would raise concern for Long QT Syndrome (risk of dangerous arrhythmias). This is well within normal limits.
5. Baseline Artifact (Noise)
There is mild muscle tremor noise visible in some leads (especially III, aVF). This is from slight patient movement during recording - not a cardiac abnormality.
What is ABSENT (All Reassuring)
- No ST elevation - rules out heart attack (STEMI)
- No ST depression - rules out ischemia
- No pathological Q waves - rules out old infarction
- No T-wave inversions - rules out strain or ischemia
- No wide QRS - rules out bundle branch block
- No short PR or delta waves - rules out Wolff-Parkinson-White syndrome
- No prolonged QTc - rules out Long QT syndrome
Final Verdict
This is a normal ECG for a healthy 17-year-old male.
The only finding is mild sinus bradycardia (54-55 bpm), which is a benign, expected finding in a young person. All waveforms, intervals, axis, and morphology are within normal limits. There is no evidence of any structural or electrical heart disease.
Disclaimer: This is an educational explanation only and does not constitute a medical diagnosis. Please consult the ordering physician or cardiologist for clinical interpretation and any follow-up decisions.
This is a shared conversation. Sign in to Orris to start your own chat.