SAMPLE ECGS-2
The above ECG sample shows a kind of arrhythmia known as atrial fibrillation (atrial palpitation)
Atria are the upper chambers of the heart. We know the pacemaker SA node is situated at the right atrium. When SA node starts the conduction which spread over all the atria and the atria contract. We know the normal atrial contractions are represented in the ECG as P wave.
See the above Fig 1. The P-waves are almost absent. Instead of P-waves (check the Normal Rhythm Image above) there are fibrillatory waves seen in the electrodes II, III, and aVF which view the heart from the bottom. The electrode I which view the atria from the top gives no clear waves at all but records fibrillatory waves. Hence we can conclude this is ATRIAL FIBRILLATION.
In atrial fibrillation the atria are fibrillating instead of contracting and hence no proper filling and emptying of the blood takes place. The ventricular contractions are also independent of atrial fibrillation and AV node. The R-R intervals are also randomly irregular. There is no PR interval as P-wave is absent. Waves are deviating randomly up and down from the baseline.
Atrial fibrillation may cause pulmonary embolism or brain damage such as stroke.
2.ATRIAL FLUTTER
In atrial fibrillation the atria are fibrillating instead of contracting and hence no proper filling and emptying of the blood takes place. The ventricular contractions are also independent of atrial fibrillation and AV node. The R-R intervals are also randomly irregular. There is no PR interval as P-wave is absent. Waves are deviating randomly up and down from the baseline.
Atrial fibrillation may cause pulmonary embolism or brain damage such as stroke.
2.ATRIAL FLUTTER
No comments:
Post a Comment