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Patient ecg Abdominal pain
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ECG normal sinus rhythm elderly abdominal pain cardiac causes differential diagnosis
Here is a complete analysis of this patient's ECG and clinical picture:
ECG Analysis - Patient: Vasudevan, Male, 75 years
Date/Time: 2026-07-03 at 09:29:48
Measured Parameters (Machine + Visual)
| Parameter | Value | Normal Range | Status |
|---|---|---|---|
| Heart Rate | 89 bpm | 60-100 bpm | Normal |
| P Duration | 136 ms | 80-120 ms | Mildly prolonged |
| PR Interval | 166 ms | 120-200 ms | Normal |
| QRS Duration | 84 ms | <120 ms | Normal |
| QT / QTc | 376 / 427 ms | QTc <450 ms (men) | Normal |
| P/QRS/T Axis | 69° / 58° / 73° | -30° to +90° | Normal axis |
| RV5+SV1 | 1.776 mV | <3.5 mV for LVH | No LVH |
ECG Interpretation
Overall: Normal Sinus Rhythm (NSR) - confirmed by machine and clinical notes
- Rhythm: Regular, sinus rhythm with upright P waves in I, II, aVF - normal.
- Rate: 89 bpm - within normal limits for a 75-year-old.
- P waves: Normal morphology - no atrial enlargement or P mitrale/pulmonale.
- PR interval: 166 ms - normal; no AV block.
- QRS: 84 ms, narrow - no bundle branch block. Normal axis at 58°.
- ST segments: Isoelectric in all leads - no ST elevation, no ST depression. This makes acute STEMI unlikely.
- T waves: Normal polarity - no hyperacute, inverted, or peaked T waves.
- QTc 427 ms: Normal - no QT prolongation.
- No pathological Q waves identified.
Machine auto-diagnosis: NSR - consistent with visual analysis.
Clinical Correlation: Abdominal Pain in a 75-Year-Old
This is a critical combination that requires careful thought:
Why cardiac causes MUST be excluded first:
- In patients >65 years, especially diabetics and women, up to 1/3 of acute MI cases present with only abdominal/epigastric pain - this is a well-recognized atypical presentation.
- Inferior MI (RCA territory) commonly causes referred epigastric/abdominal pain via the vagus nerve and diaphragmatic irritation.
- This ECG, while showing NSR, does not fully exclude NSTEMI - NSTEMI can present with a normal or near-normal ECG.
- 45% of elderly patients with unstable angina have NO chest pain (PMC study on geriatric abdominal emergencies).
What the ECG does NOT show (reassuring):
- No ST elevation → acute STEMI unlikely
- No new Q waves → no completed transmural infarct visible
- No ST depression → no obvious subendocardial ischemia on resting tracing
- No T-wave inversions → no Wellens' pattern
What this ECG CANNOT rule out:
- NSTEMI - requires serial ECGs + troponin (high sensitivity)
- Mesenteric ischemia - no ECG findings
- Aortic dissection - can be normal on ECG
- Pulmonary embolism - can be normal (S1Q3T3 is present in only ~10%)
Handwritten Clinical Notes - Decoded
| Note | Interpretation |
|---|---|
| SpO2 97% | Acceptable, but monitor |
| ASBE, S1S2 + | Clear air entry bilaterally; normal heart sounds |
| Spine - No tenderness | Musculoskeletal cause less likely |
| RPT 15/1.1 | Blood Urea 15, Creatinine 1.1 - mildly elevated creatinine, watch renal function |
| ECG - NSR | Confirmed normal sinus rhythm |
| CXR - rotated film | Not reliable for interpretation; repeat required |
| Treat productive cough | Respiratory co-morbidity noted |
| Repeat CXR | Wise - current film unreliable |
| Na, K, BT/CT, PT/INR, BG | Electrolytes, coagulation, glucose ordered |
| HBsAg, HIV | Screening ordered |
Priority Actions for This Patient
Immediate:
- Serial troponin (hsTroponin at 0 and 3 hours) - to rule out NSTEMI. This is mandatory given age + abdominal pain + the ECG being taken specifically.
- Repeat ECG in 30-60 minutes - serial ECGs can unmask evolving ischemic changes.
- Right-sided ECG leads (V3R, V4R) - to specifically look for right ventricular infarction (common with inferior MI, which can present as abdominal pain).
Investigations (already ordered or pending):
- Serum Na, K (electrolyte disturbances can cause abdominal pain and affect QT)
- PT/INR, BT/CT - coagulation profile
- Blood glucose - DKA can mimic abdominal emergency
- Repeat CXR (non-rotated) - look for free air, aortic silhouette, pulmonary edema
Consider:
- Serum lipase/amylase - to exclude pancreatitis
- USG abdomen - cholecystitis, AAA, mesenteric pathology
- D-dimer if PE or dissection suspected
- CT abdomen if surgical cause not excluded
Summary
This ECG shows Normal Sinus Rhythm with no acute ischemic changes at the time of recording. However, in a 75-year-old male with abdominal pain, a normal resting ECG does not exclude NSTEMI or unstable angina - these are life-threatening diagnoses that present atypically in the elderly. The clinical team is appropriately investigating, but serial troponins and repeat ECGs are the single most important next step before attributing the abdominal pain to a non-cardiac cause.
Disclaimer: This analysis is for educational/clinical support purposes only. Decisions must be made by the treating physician after direct patient evaluation.
Low voltage ecg is it? Name of such
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Is This a Low Voltage ECG?
No - This ECG Does NOT Have Low Voltage
The standard definition of Low Voltage ECG:
- QRS amplitude < 5 mm (0.5 mV) in ALL 6 limb leads (I, II, III, aVR, aVL, aVF)
- AND/OR QRS amplitude < 10 mm (1.0 mV) in ALL 6 precordial leads (V1-V6)
This patient's voltages (from machine printout):
| Measurement | Value | Low Voltage Threshold |
|---|---|---|
| RV5 amplitude | 13.72 mm (1.372 mV) | <10 mm = low |
| SV1 amplitude | 4.04 mm | - |
| RV5 + SV1 | 17.76 mm (1.776 mV) | Used for LVH, not low voltage |
| RV6 amplitude | 12.60 mm | - |
RV5 at 13.72 mm is well above the 10 mm precordial threshold. This is not low voltage.
What IS Low Voltage ECG Called?
The condition is simply called "Low Voltage ECG" or "Low QRS Voltage" in clinical practice. There is no single eponymous name for it, but here are the relevant terms:
| Term | Meaning |
|---|---|
| Low voltage ECG | Standard clinical term |
| Low QRS voltage | Formal electrocardiographic term |
| Electrical alternans | A specific pattern seen in large pericardial effusion where QRS alternates in height - a special subtype |
| Microvoltage | Sometimes used, especially in European literature |
Causes to Remember ("COPE" mnemonic + extras)
Extra-cardiac causes (insulating the heart from chest wall electrodes):
| Cause | Mechanism |
|---|---|
| Obesity | Increased chest wall adipose tissue |
| COPD / emphysema | Hyperinflated lungs act as insulators |
| Pleural effusion | Fluid between lung and chest wall |
| Pericardial effusion | Fluid surrounding the heart - classic cause |
| Anasarca / edema | Generalized fluid in soft tissue |
| Pneumothorax | Air insulates |
Cardiac (myocardium itself is damaged/replaced):
| Cause | Mechanism |
|---|---|
| Cardiac amyloidosis | Classic - infiltrative disease replaces myocytes; low voltage + LVH on echo is the hallmark combination |
| Dilated cardiomyopathy | Diffuse fibrosis |
| Myocarditis | Diffuse inflammation |
| Multiple prior MIs | Scar replaces viable myocardium |
| Hypothyroidism (myxedema) | Pericardial effusion + myxedematous infiltration |
| Sarcoidosis | Granulomatous infiltration |
Classic teaching point:
Cardiac amyloidosis shows the pathognomonic combination of low voltage on ECG + increased wall thickness (pseudohypertrophy) on echo - the voltage is paradoxically LOW despite the heart being thick, because amyloid is electrically silent.
Why This Patient's ECG is NOT Low Voltage
The precordial voltages (RV5 = 13.72 mm, RV6 = 12.60 mm) are clearly above the 10 mm threshold. The limb lead voltages visually appear adequate as well. The ECG is simply Normal Sinus Rhythm with normal voltage - no low voltage pattern.
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