ECG Interpretation

Measured Intervals & Parameters

Computer-Generated Interpretation

1. 800 — Normal Sinus Rhythm
2. 752 — Inferior Abnormal QK (< 18 years)
3. Borderline Abnormal ECG ⚠️ (Unconfirmed — needs physician review)

Lead-by-Lead Analysis (from visible tracings)

• Lead II & III: Upright P waves confirm sinus rhythm. QRS complexes are narrow and regular. The "inferior abnormal QK" flag likely refers to a Q wave pattern in the inferior leads (II, III, aVF) that the machine considers abnormal for a patient under 18.
• aVR: Expected negative QRS deflection — consistent with normal axis.
• aVL: Small or biphasic QRS expected given the axis ~37–41°.
• aVF: Upright — consistent with normal inferior axis.

• V1: rS pattern visible — normal for V1.
• V2–V3: Transitional zone morphology, prominent positive deflections visible — may represent early transition.
• V4–V5: Tall R waves; RV5/SV1 ratio of 1.31/0.66 mV — within normal limits, no LVH criteria met by voltage alone.
• V6: Upright QRS, normal lateral morphology.
• No obvious ST elevation or depression noted across the precordial leads.
• T waves appear upright in lateral leads.

Key Findings & Clinical Significance

Summary & Recommendations

1. QTc 448 ms — borderline prolonged. In a patient under 18 years, QTc >440 ms raises consideration of congenital long QT syndrome (LQTS), drug-induced QTc prolongation, or electrolyte abnormalities (hypokalemia, hypomagnesemia, hypocalcemia).
2. Inferior Q wave abnormality (code 752) — physiologic Q waves in inferior leads are common in young patients, but the machine flagged this as abnormal for age. Clinical correlation is essential.

Important: The machine explicitly states "Unconfirmed Report — Need to Review." This ECG must be reviewed and interpreted by a qualified physician or cardiologist, especially given the patient's age (<18 years), borderline QTc, and the inferior lead abnormality flag. A clinical history, medication review, and electrolyte panel would be appropriate next steps.

Revised ECG Interpretation (Patient >45 Years)

Re-evaluation of Machine Flags in Context

Parameters Re-assessed for Adult (>45 years)

Critical Re-interpretation: Inferior Q Waves in a >45-Year-Old

• Symptoms (chest pain, dyspnea, prior cardiac history)
• Previous ECGs for comparison
• Cardiac biomarkers (Troponin, CK-MB) if any acute presentation
• Echocardiogram to assess inferior wall motion

QTc 448 ms in a >45-Year-Old

• In males >45: QTc 448 ms is mildly prolonged (normal <440 ms)
• In females >45: QTc 448 ms is within normal limits (<460 ms)
• Causes to consider at this age:
  • Medications (antiarrhythmics, antipsychotics, antibiotics like azithromycin)
  • Electrolyte imbalance (hypokalemia, hypomagnesemia)
  • Structural heart disease
  • Hypothyroidism

Revised Summary

Recommended Next Steps

1. Compare with prior ECGs — are these Q waves new or old?
2. Cardiac biomarkers (Troponin) if any symptoms present
3. Echocardiogram — assess inferior wall motion abnormality
4. Electrolyte panel — K⁺, Mg²⁺, Ca²⁺ (for QTc)
5. Medication review — any QT-prolonging drugs?
6. Cardiology referral if Q waves are new or patient is symptomatic

The "Unconfirmed — Need to Review" note from the machine still stands. A qualified physician must review this ECG in full clinical context.