What could be diagnosis based on this ecg
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Let me analyze this ECG carefully. I can read the machine's automated interpretation on the printout, and I'll correlate it with the waveforms.
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sinus tachycardia ECG left axis deviation nonspecific T wave changes
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Here is a detailed analysis of this ECG:
ECG Analysis — Renu Aagarwal | 22.04.2026 | 00:09:45
Machine-Reported Parameters (from the printout)
| Parameter | Value |
|---|---|
| Heart Rate | 109 bpm |
| RR interval | 548 ms |
| P duration | 148 ms |
| PRS | 126 ms |
| QT | 320 ms |
| QTcB | 432 ms |
| P axis | 57° |
| QRS axis | 12° |
| T axis | 19° |
Machine Interpretation (printed on ECG)
The Schiller device automatically flagged:
- Sinus tachycardia
- Leftward electrical axis
- Nonspecific T abnormality
- Borderline ECG
- Unconfirmed report
Clinical Interpretation
1. Sinus Tachycardia (HR 109 bpm)
- Upright P waves in lead II, regular rhythm, rate >100 bpm
- The causes are broad and require clinical correlation:
- Physiological: pain, anxiety, fever, exercise, dehydration
- Cardiac: heart failure, pericarditis, myocarditis
- Non-cardiac: anemia, thyrotoxicosis, pulmonary embolism, sepsis, hypovolemia
2. Leftward Electrical Axis (QRS axis ~12°)
- Still within normal range technically (−30° to +90°), though the machine flags it as "leftward"
- If axis were more negative (<−30°), it would suggest Left Anterior Fascicular Block (LAFB)
- Causes of leftward shift: LV hypertrophy, inferior MI, LAFB, obesity, pregnancy
3. Nonspecific T-Wave Abnormality
- T-wave flattening or subtle inversions, not meeting criteria for ischemia
- Seen with: electrolyte imbalances (hypokalemia, hypomagnesemia), digoxin effect, myocardial strain, pericarditis, cardiomyopathy, or simply hyperventilation/anxiety
4. QTcB = 432 ms
- Borderline prolonged (normal <440 ms in females — this patient is female)
- Warrants monitoring, especially if on QT-prolonging medications
Differential Diagnoses to Consider
| Priority | Condition | Reason |
|---|---|---|
| 🔴 Must exclude | Pulmonary embolism | Sinus tachycardia + nonspecific T changes in a female patient |
| 🔴 Must exclude | ACS / demand ischemia | Tachycardia + T-wave changes |
| 🟡 Consider | Thyrotoxicosis | Sinus tachycardia, can cause axis/T-wave changes |
| 🟡 Consider | Anemia | Common cause of sinus tachycardia with nonspecific changes |
| 🟡 Consider | Dehydration / sepsis | Physiologic tachycardia |
| 🟡 Consider | Hypokalemia / electrolyte disorder | Nonspecific T-wave abnormality |
| 🟢 Less urgent | Anxiety / pain | Physiologic tachycardia |
Recommended Next Steps
- Clinical history — symptoms (chest pain, dyspnea, palpitations, fever, weight loss)
- Vitals — BP, SpO₂, temperature
- Blood tests — CBC, electrolytes (K⁺, Mg²⁺), TFTs, troponin, D-dimer if PE suspected
- Repeat ECG at rest — if initially taken during distress
- Echocardiography — if structural cause suspected
⚠️ Disclaimer: This ECG analysis is for educational purposes only and does not replace a clinical assessment by a licensed physician. The machine interpretation itself states "Unconfirmed report." Always correlate with patient symptoms and clinical findings.
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