ECG Analysis - Patient SUKHLA (38-year-old Male, 12-Jul-2026)

Patient & Machine Details

Measured Parameters (from printout)

Lead-by-Lead Waveform Summary

Limb Leads (I, II, III)

• Lead I & II: Upright P waves before every QRS - confirms sinus origin. Narrow QRS with prominent R waves. Upright T waves.
• Lead III: Smaller amplitude, upright QRS and T - all normal.

Augmented Leads (aVR, aVL, aVF)

• aVR: Inverted P, inverted QRS, inverted T - this is entirely expected and normal (aVR faces away from the heart).
• aVL: Low-amplitude, flat/slightly biphasic - normal for this axis.
• aVF: Upright P, R, and T waves - normal inferior lead.

Precordial Leads (V1-V6)

• V1-V2: rS pattern (small r, deep S) - normal for right-sided leads.
• V3: Transitional zone - approximately equal R and S (normal).
• V4-V6: Progressive increase in R wave amplitude (tall, dominant R) - this is normal R wave progression. No abnormal Q waves seen.
• T waves are upright throughout V1-V6 - no T wave inversions.

Overall Interpretation

Primary Finding: Sinus Tachycardia

• P waves are present before every QRS, with a fixed PR interval of 134 ms.
• Rate of 103 bpm meets the definition of sinus tachycardia (>100 bpm with sinus P waves).
• In a 38-year-old male, common causes include: anxiety/stress, pain, fever, dehydration, anemia, thyroid disease, or stimulant intake. Can also be a normal finding post-exertion.

Secondary Finding: Borderline Prolonged QTc (445 ms)

• Normal for males is < 440 ms; 440-460 ms is considered borderline.
• This patient's QTc of 445 ms is in the borderline zone.
• Possible causes: electrolyte imbalance (low potassium/magnesium), certain medications (antibiotics like azithromycin, antifungals, antipsychotics), or congenital Long QT Syndrome (LQTS).
• Prolonged QTc carries a small risk of a dangerous arrhythmia called Torsades de Pointes (TdP).
• At this borderline level, the risk is low but warrants a clinical review of medications and electrolytes.

What is Normal on This ECG:

• Normal QRS duration (84 ms) - no bundle branch block
• Normal PR interval (134 ms) - no heart block
• Normal P, QRS, and T axes - no axis deviation
• Normal R wave progression V1-V6 - no old anterior MI pattern
• No ST elevation or depression - no acute ischemia
• No pathological Q waves - no old infarction
• No LVH or RVH pattern

What is an ECG? (Background)

The Normal ECG Waveform:

• P wave - atrial depolarization (atria contract)
• PR interval - conduction through the AV node
• QRS complex - ventricular depolarization (ventricles contract, pumping blood)
• ST segment - ventricular plateau (early repolarization)
• T wave - ventricular repolarization (ventricles reset)
• QT interval - total duration of ventricular activity (depolarization + repolarization)

Clinical Recommendation

Disclaimer: This analysis is for educational purposes only and is not a substitute for evaluation by a qualified cardiologist.

1. Sinus tachycardia - investigate the underlying cause (rest ECG vs. post-exertion, check thyroid function, CBC, hydration status).
2. Borderline QTc (445 ms) - review current medications for QT-prolonging drugs, check serum potassium and magnesium levels. If symptomatic (palpitations, dizziness, syncope), cardiology referral is advised.
3. No acute ischemic changes, no conduction disease, no structural abnormality pattern detected on this ECG - overall a reassuring tracing aside from the rate and borderline QTc.