ECGs in Athletes

Revision as of 21:09, 14 October 2007 by Drj (talk | contribs)
aIncreasing less than 100 beats/min during limited exercise test. bNot shortening with hyperventilation or limited exercise test.
Criteria for a positive 12-lead ECG
P wave
  • left atrial enlargement: negative portion of the P wave in lead V1 ≥ 0.1 mV in depth and ≥ 0.04 s in duration
  • right atrial enlargement: peaked P wave in leads II and III or V1 ≥ 0.25 mV in amplitude
QRS complex
  • frontal plane axis deviation: right ≥ +120° or left –30° to –90°;
  • increased voltage: amplitude of R or S wave in in a standard lead ≥2 mV, S wave in lead V1 or V2 ≥ 3 mV, or R wave in lead V5 or V6 ≥ 3 mV;
  • abnormal Q waves ≥ 0.04 s in duration or ≥ 25% of the height of the ensuing R wave or QS pattern in two or more leads;
  • right or left bundle branch block with QRS duration ≥ 0.12 s;
  • R or R' wave in lead V1 ≥ 0.5 mV in amplitude and R/S ratio ≥ 1.
ST-segment, T-waves, and QT interval
  • ST-segment depression or T-wave flattening or inversion in two or more leads;
  • prolongation of heart rate corrected QT interval (QTc) > 0.44 s in males and > 0.46 s in females.
Rhythm and conduction abnormalities
  • premature ventricular beats or more severe ventricular arrhythmias;
  • supraventricular tachycardias, atrial flutter, or atrial fibrillation;
  • short PR interval (< 0.12 s) with or without ‘delta’ wave;
  • sinus bradycardia with resting heart rate ≤ 40 beats/mina;a
  • first (PR ≥ 0.21 sb), second or third degree atrioventricular block.


References

<biblio>

  1. corrado pmid=15689345

</bilbio>