Orris
attachment

Analysis report

Reading File
Finding Sources
Searching PubMed

ECG interpretation systematic approach

Reading File
Now I have sufficient background. Let me perform a thorough analysis of the ECG image provided.

12-Lead ECG Analysis Report

Device: BPL GenX3 Patient ID: 0086242 Settings:
  • Paper speed: 25 mm/sec
  • Gain (limb leads): 18 mm/mV
  • Gain (chest leads): 10 mm/mV
  • Filter: 0.5 - 32 Hz

Technical Quality

The ECG strip is photographed at an angle, which limits precise interval measurement. Image quality is moderate - readable but not ideal. No obvious lead reversal artifacts are apparent.

Systematic Analysis (14-Parameter Approach per Harrison's Internal Medicine)

1. Rhythm Regular rhythm. P waves appear to precede each QRS complex. This is normal sinus rhythm (NSR).
2. Heart Rate Based on the R-R interval at 25 mm/sec paper speed, the rate appears to be approximately 75-90 beats per minute - within normal range.
3. P Waves
  • Visible and upright in leads I, II, aVF
  • Inverted in aVR (normal)
  • P waves appear to be of normal morphology and duration
  • No evidence of P mitrale (bifid P) or P pulmonale (peaked P)
4. PR Interval Appears to be within normal range (~120-200 ms). No obvious prolongation suggesting first-degree AV block.
5. QRS Complex
  • Narrow QRS complexes throughout (<120 ms)
  • No bundle branch block morphology
  • No delta waves to suggest pre-excitation (WPW)
6. QT Interval Appears normal for the heart rate. No obvious prolongation.
7. Electrical Axis
  • Positive QRS in lead I and lead aVF suggests a normal axis (0° to +90°)
8. QRS Voltages
  • Voltages appear within normal range
  • No obvious criteria met for left ventricular hypertrophy (LVH) or right ventricular hypertrophy (RVH)
  • Note: gain in chest leads is set at 10 mm/mV (half standard), which means true voltage may be double what appears - this must be accounted for when estimating amplitudes
9. Precordial R-Wave Progression (V1-V6)
  • R-wave appears to transition normally from small in V1 to taller in V4-V5
  • No evidence of poor R-wave progression (which would suggest anterior infarction)
10. Pathological Q Waves
  • No definite pathological Q waves identified in the limb or precordial leads
  • No evidence of old myocardial infarction pattern
11. ST Segments
  • ST segments appear to be at the isoelectric baseline in the visible leads
  • No obvious ST elevation or depression suggestive of ischemia or injury
12. T Waves
  • T waves appear upright in leads I, II, aVF, V4-V6
  • T-wave inversion in aVR is normal
  • No obvious deep T-wave inversions or hyperacute T waves
13. U Waves
  • U waves are not clearly distinguishable at this image resolution.

Summary / Impression

ParameterFinding
RhythmNormal Sinus Rhythm
Rate~75-90 bpm (normal)
AxisNormal (~0° to +90°)
PR intervalNormal
QRS durationNormal (narrow)
ST changesNone identified
T wavesNormal
Q wavesNo pathological Q waves
HypertrophyNot identified
Overall Impression: This ECG appears within normal limits for a routine tracing.

Important Limitations & Disclaimer

This analysis is based on visual inspection of a photographed ECG strip at an angle, which limits precise measurement of intervals and amplitudes. The chest lead gain is set at 10 mm/mV (half-standard), which must be noted when interpreting voltages. This report is for educational/informational purposes only and is not a substitute for formal clinical interpretation by a licensed cardiologist or physician. Any clinical decision must be made by a qualified healthcare professional with full patient context (symptoms, history, medications, prior ECGs).
  • Harrison's Principles of Internal Medicine, 22E - Clinical ECG Interpretation section
This is a shared conversation. Sign in to Orris to start your own chat.