Ecg findings
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T wave inversion flattened ECG clinical significance
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Here is a thorough analysis of this ECG:
ECG Analysis
Machine-Reported Parameters (from the strip header)
| Parameter | Value |
|---|---|
| Rate | ~103 bpm (Heart rate ♥103) |
| PR/QRS/QT | 310/406 ms |
| PORST | 64/5/132 |
| R/V5/SV1 | 0.652/1.173 mV |
| Axis | ~103° (right axis deviation) |
| Machine interpretation | Flattened T wave (V5), Inverted T wave (aVL) |
Key Findings on Visual Review
1. Rate & Rhythm
- Sinus tachycardia at ~103 bpm
- Regular rhythm, P waves present and preceding each QRS
2. Axis
- Right axis deviation (~103°) - positive QRS in lead III, negative/isoelectric in lead I
3. QRS Complex
- No pathological Q waves clearly visible
- QRS duration appears normal (~80-100 ms range)
4. ST Segment & T Waves (the dominant findings)
- Flattened T wave in V5 - confirmed by machine
- Inverted T wave in aVL - confirmed by machine
- T waves in V1-V4 appear relatively small/flat
- T inversion in aVL is notable - can be a reciprocal change or early lateral ischemia marker
5. QT interval
- QTc appears within normal range per machine measurements
Clinical Interpretation
The combination of sinus tachycardia + right axis deviation + T wave flattening (V5) + T wave inversion (aVL) has several potential explanations:
| Diagnosis | Supporting Features |
|---|---|
| Acute Coronary Syndrome (NSTEMI/UA) | T inversion in aVL (lateral lead), flat T V5; tachycardia |
| Inferior wall ischemia | T inversion in aVL is a classic reciprocal change to inferior STEMI/ischemia (check II, III, aVF closely) |
| Right heart strain / PE | Sinus tachycardia + right axis deviation + T changes in precordial leads |
| Hypokalemia / electrolyte disturbance | Flattened T waves across multiple leads |
| LVH with strain | Lateral T wave flattening/inversion |
| Non-specific ST-T changes | If no clinical context for the above |
Most Important Flags
The inverted T wave in aVL is a well-documented harbinger of acute inferior MI - it can precede ST elevation in the inferior leads (II, III, aVF) and should be taken very seriously in the right clinical context. (Roberts & Hedges' Clinical Procedures in Emergency Medicine; Braunwald's Heart Disease)
The sinus tachycardia + right axis deviation combination warrants ruling out pulmonary embolism, especially if the patient has dyspnea, pleuritic chest pain, or risk factors. (Harrison's Principles, 22E)
Recommended Next Steps (Clinical)
- Compare with old ECG - are these T changes new?
- Troponin / cardiac biomarkers - rule out NSTEMI
- Clinical correlation - chest pain, dyspnea, syncope?
- Electrolytes (K⁺, Mg²⁺) if no obvious ischemic story
- D-dimer / CT-PA if PE is suspected
Disclaimer: This is an AI-assisted ECG interpretation for educational/support purposes. All findings must be confirmed by a qualified clinician in the context of the patient's full clinical picture.
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