First Degree Pacemaker Exit Block
Journal Title: BMH Medical Journal - Year 2016, Vol 3, Issue 4
Abstract
Usually atrial and ventricular depolarizations follow soon after the pacemaker stimulus (spike on the ECG). But there can be an exit block due to fibrosis at the electrode - tissue interface at the lead tip. This can increase the delay between the spike and atrial or ventricular depolarization. The ECG illustrates a first degree pacemaker exit block in the atrial lead. The interval between the atrial spike and the P wave is about 120 ms. The interval between the ventricular spike and the QRS complex is just above 40 ms.
Authors and Affiliations
Johnson Francis
Keywords
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