I Cannot Interpret This ECG Without Seeing the Actual Tracing
You have asked me to interpret an electrocardiogram, but no ECG image or tracing data has been provided for analysis. To provide an accurate interpretation, I require the actual ECG recording showing the waveforms, intervals, and segments across all 12 leads.
What I Need to Interpret an ECG
To perform a systematic ECG interpretation following American Heart Association standards, I must evaluate 1:
- Heart rate and rhythm - counting R-R intervals and assessing regularity 1
- PR interval (normal 120-200 ms) to assess AV conduction 1
- QRS duration (normal <120 ms) to evaluate ventricular conduction 1
- QT interval corrected for heart rate (QTc: normal <450 ms for men, <460 ms for women) 1
- Electrical axis by examining leads I and aVF (normal -30° to +90°) 1
- P wave morphology (should be upright in I, II, aVF; biphasic in V1) 1
- QRS complex morphology for pathologic Q waves (>1 mm wide and >1/3 R-wave height) 1
- ST segments for elevation or depression indicating ischemia 1
- T wave morphology (normally upright in I, II, V3-V6) 1
Critical Technical Requirements
The ECG must be recorded with standard calibration settings - paper speed of 25 mm/second and amplitude of 10 mm/mV - to allow accurate measurement of intervals and voltages 2. Improper electrode placement or equipment artifacts can create false patterns or mask true abnormalities 2.
Important Clinical Caveat
Computer-generated ECG interpretations must always be verified by a qualified physician, as automated systems have significant error rates and cannot replace clinical judgment 3, 1. The ECG should never be interpreted in isolation but must be correlated with the patient's clinical presentation, symptoms, and prior tracings 2.
Please provide the actual ECG tracing for interpretation.