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Interpret this ecg

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I now have enough from the library and my own knowledge to give a thorough interpretation. Let me compose the full answer.

ECG Interpretation

Machine-read parameters (from the printout):
  • Date/Time: 10-06-2026, 05:12:34 PM
  • HR: 86 bpm
  • PR: 199 ms (borderline prolonged, upper limit of normal is ~200 ms)
  • QRS: 82 ms (normal)
  • QT/QTc: 373/449 ms (QTc borderline prolonged)
  • P/QRS/T axis: 39/87/-4
  • RV5/SV1: 0.475/0.000 mV
  • Settings: 25 mm/s, 10 mm/mV (standard)

Machine Diagnosis (confirmed on the strip):

  1. Sinus Rhythm
  2. Abnormal T Wave in V1
  3. Poor T Wave Progression (V2, V3)
  4. Anteroseptal Myocardial Infarction
  5. Low Voltage

Manual Interpretation

1. Rhythm

  • Sinus rhythm at 86 bpm. Regular.
  • PR interval ~199 ms - borderline first-degree AV block (normal upper limit is 200 ms); clinically insignificant at this value but worth noting.

2. QRS Axis

  • QRS axis ~87 degrees - normal (0-90° range). No axis deviation.

3. Poor R Wave Progression (PRWP)

  • In the precordial leads V1-V3, R waves fail to grow progressively in amplitude as they should normally (R wave should be ≥3 mm by V3).
  • PRWP in V2-V3 combined with the machine's call of anteroseptal MI is a key finding.
  • PRWP can represent: anterior/anteroseptal MI (old or acute), left bundle branch block, LVH, COPD, cardiomyopathy, or lead misplacement.

4. Abnormal T Wave in V1

  • An abnormal (likely inverted or biphasic) T wave in V1 is flagged.
  • T wave inversion in V1-V3 in the context of PRWP and anteroseptal pattern strongly suggests ischemia or infarction in the LAD (left anterior descending) territory.

5. Anteroseptal Myocardial Infarction

  • The combination of PRWP in V2-V3 + T wave abnormalities in V1-V3 + likely absence of R wave development (QS or rS morphology in V1-V3) points to anteroseptal MI.
  • Without visible ST elevation, this could represent:
    • Old/completed anteroseptal NSTEMI or STEMI (scar, with loss of septal R waves)
    • Evolving/subacute NSTEMI if there is T-wave inversion (Wellens-like pattern)
  • The note on the paper "15/5/26 @ 6 am" likely records when symptoms started or when the patient was first seen - this ECG was done on 10-06-2026, so this could represent a chronic or previously undiagnosed infarction if that date is accurate.

6. Low Voltage

  • RV5 = 0.475 mV and SV1 = 0.000 mV - these are very low.
  • Low voltage criteria: limb lead QRS amplitude <5 mm in all leads AND/OR precordial leads <10 mm.
  • Causes include: pericardial effusion, obesity, COPD/emphysema, hypothyroidism, infiltrative cardiomyopathy (amyloidosis - classic association per The Washington Manual: "The classic ECG finding in amyloidosis is low voltage... with poor R-wave progression"), myxedema, or large anterior MI with loss of myocardial mass.

7. QTc

  • QTc 449 ms - borderline prolonged (normal <440 ms in men, <460 ms in women). Monitor; avoid QT-prolonging drugs.

Clinical Correlation - Key Questions

FindingMost Likely Significance
PRWP + abnormal T V1-V3Anteroseptal MI (LAD territory)
Low voltagePericardial effusion? Amyloidosis? COPD? Obesity?
Borderline PR 199 msEarly first-degree AVB or normal variant
QTc 449 msBorderline - monitor electrolytes and medications

Recommended Next Steps

  1. Compare with prior ECGs - Is this a new or old finding? This is the most important step.
  2. Serial troponins (high-sensitivity troponin I or T) to rule in/out acute MI.
  3. Echocardiogram - to assess regional wall motion abnormalities (anteroseptal hypokinesis/akinesis), LV function, and rule out pericardial effusion (which would explain low voltage).
  4. Clinical history - chest pain, dyspnea, syncope? Prior cardiac history?
  5. Check electrolytes (K+, Mg2+) given borderline QTc.
  6. If new ST changes or dynamic ECG: urgent cardiology referral/cath lab activation.
Important disclaimer: This is an AI-assisted ECG interpretation for educational support only. It must be reviewed and confirmed by a qualified physician. The "Report Confirmed by:" field on this strip appears unsigned - this ECG requires formal physician sign-off before clinical decisions are made.

Interpret the above ecg

I've already interpreted this ECG in my previous response above. Here's a concise summary of the key findings:

Summary of ECG Findings

Patient: Valluvanad Hospital | Date: 10-06-2026, 05:12 PM | HR: 86 bpm | 25mm/s, 10mm/mV

Key Parameters

ParameterValueInterpretation
Heart Rate86 bpmNormal
PR interval199 msBorderline (upper limit of normal)
QRS duration82 msNormal
QTc449 msBorderline prolonged
QRS axis+87°Normal

Diagnoses (machine + manual confirmed)

  1. Sinus Rhythm - regular, 86 bpm, no arrhythmia
  2. Anteroseptal Myocardial Infarction - PRWP in V2-V3 + T wave abnormality in V1, consistent with LAD territory infarction (likely old/completed; compare with prior ECGs and check serial troponins)
  3. Poor R Wave Progression (V2-V3) - R waves fail to grow across precordium; loss of septal forces
  4. Abnormal T Wave in V1 - inversion/biphasic morphology suggesting anteroseptal ischemia
  5. Low Voltage - RV5 only 0.475 mV, SV1 = 0.000 mV; consider pericardial effusion, amyloidosis, COPD, or obesity as underlying causes

Immediate Action Points

  • Serial high-sensitivity troponins
  • Echocardiogram (wall motion abnormality + rule out effusion)
  • Compare with any prior ECG
  • Cardiology review - the "Report Confirmed by:" line is blank/unsigned
This interpretation is for clinical support only and requires physician confirmation before any management decisions.

Patient is stable and no chest pain complaints came for ortho surgery fitness

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Searching PubMed

preoperative cardiac evaluation noncardiac surgery guidelines

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Excellent - this gives a thorough evidence base. Here is the clinical fitness assessment:

Pre-operative Cardiac Fitness for Orthopaedic Surgery

Context

  • Stable patient, no chest pain, no active cardiac symptoms
  • ECG shows: likely old anteroseptal MI (PRWP + T-wave changes V1-V3), low voltage, sinus rhythm
  • Coming for elective orthopaedic surgery

Step-by-Step ACC/AHA Risk Stratification (2024 Guidelines)

Step 1 - Urgency: Elective orthopaedic surgery - not urgent. Full evaluation is warranted.
Step 2 - Active Cardiac Conditions (ACS)?
  • No chest pain, patient is stable - No active ACS. Proceed.
Step 3 - Surgical Risk:
  • Most orthopaedic procedures (joint replacement, fracture fixation) fall in the intermediate-risk category (1-5% risk of MACE).
  • Major emergency orthopaedic surgery (e.g. hip fracture) can be higher.
Step 4 - Functional Capacity:
  • Key question to ask the patient: Can they climb 1-2 flights of stairs or walk a block briskly without symptoms?
  • If ≥4 METs without symptoms → proceed to surgery at low perioperative risk
  • If <4 METs (poor functional capacity) → further workup needed
Step 5 - RCRI Score (Revised Cardiac Risk Index):
Risk FactorPresent?
Ischemic heart disease (ECG suggests old MI)+1 (likely)
History of CHFUnknown - need to ask
History of stroke/TIAUnknown - need to ask
Insulin-dependent diabetesUnknown - need to ask
Creatinine ≥2 mg/dLUnknown - need to check
  • If RCRI = 1 (IHD only, no other factors) → low-intermediate risk, can proceed to surgery
  • If RCRI = 2+ → intermediate-high risk, consider stress testing

What the ECG Findings Mean for Fitness

ECG FindingPerioperative Implication
Old anteroseptal MI patternSuggests known/silent prior CAD - increases RCRI by 1 point
Low voltageNeeds echocardiogram to rule out pericardial effusion or reduced EF
No arrhythmiaFavourable
Stable sinus rhythmFavourable
QTc 449 msAvoid QT-prolonging drugs perioperatively (e.g. ondansetron, certain antibiotics)

Minimum Work-up Before Clearing for Surgery

  1. Echocardiogram - most important next step to assess:
    • LV ejection fraction (EF <35% significantly raises surgical risk)
    • Regional wall motion abnormality (confirms old infarct)
    • Pericardial effusion (explains low voltage)
    • Valvular disease
  2. Troponin (high-sensitivity) - one sample to confirm no acute/subacute injury
  3. Basic labs: Creatinine, blood glucose (complete RCRI scoring), electrolytes (K+, Mg2+ for QTc)
  4. Functional history: Ask about exercise tolerance, dyspnea on exertion, orthopnea
  5. Stress test: Only needed if functional capacity is unclear AND the result would change management

Fitness Opinion Framework

ScenarioRecommendation
Echo normal EF, no effusion, RCRI=1, good functional capacityFit for surgery with standard monitoring
Echo shows reduced EF (35-50%), RCRI=1-2Conditionally fit - optimize medically, enhanced monitoring, cardiology co-management
EF <35% or large effusion or RCRI ≥3Defer surgery - cardiology referral first
Active ischemia on stress testNot fit - revascularisation before elective surgery

Suggested Pre-operative Fitness Letter Wording (pending echo)

"Patient has ECG changes consistent with a probable old anteroseptal myocardial infarction. Currently asymptomatic with no chest pain. Cardiac risk is [low/intermediate] based on RCRI scoring. Echocardiogram is recommended prior to surgery to assess LV function. If echo shows preserved ejection fraction (≥50%) with no effusion, patient may be cleared for elective orthopaedic surgery under standard anaesthetic monitoring with cardiology awareness."
Bottom line: Do not clear blindly on ECG alone. An echo is mandatory given the low voltage + old MI pattern before signing fitness. If echo is normal/near-normal and functional capacity is adequate, this patient can likely proceed safely.
  • Washington Manual of Medical Therapeutics, Perioperative Cardiovascular Evaluation, p.27-29
  • 2024 AHA/ACC Guideline for Perioperative Cardiovascular Management [PMID: 39316661]
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