Talk:Puzzle 2008 04 014 Answer: Difference between revisions
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With interest I read the comment of the ecgpedia visitor on our previously published rhythm puzzle. First, it is important to state that in our answer to the puzzle, we say that figure 1B shows a combined right bundle branch and left anterior fascicular block ''configuration''. This statement does not include an explanation for this configuration. Furthermore, the ECG as depicted in figure 1B shows a regular rhythm of nearly 100 bpm, which makes a junctional escape rhythm, as stated by the visitor, unlikely. | With interest I read the comment of the ecgpedia visitor on our previously published rhythm puzzle. First, it is important to state that in our answer to the puzzle, we say that figure 1B shows a combined right bundle branch and left anterior fascicular block ''configuration''. This statement does not include an explanation for this configuration. Furthermore, the ECG as depicted in figure 1B shows a regular rhythm of nearly 100 bpm, which makes a junctional escape rhythm, as stated by the visitor, unlikely. | ||
An accelerated idioventricular rhythm (AIVR) is frequently observed in the setting of acute myocardial infarction. It is usually a broad complex rhythm at a frequency of 60-120 bpm originating from the ventricular myocardium. If AIVR originates nearby the left posterior fascicle of the left bundle, this will result in ventricular conduction and activation with a likely ''configuration'' as shown in figure 1B. | An accelerated idioventricular rhythm (AIVR) is frequently observed in the setting of acute myocardial infarction. It is usually a broad complex rhythm at a frequency of 60-120 bpm originating from the ventricular myocardium. If AIVR originates nearby the left posterior fascicle of the left bundle, this will result in ventricular conduction and activation with a likely ''configuration'' as shown in figure 1B. | ||
Hi, thanks for your quick response. | |||
Just curious, why would you comment on the significance of acquired ischaemic bifascicular block then, if what we are seeing is merely a coincidental bifascicular block configuration VT? All you can say, correct me if I'm wrong, is that the rhythm is coming from somewhere near the left posterior fascicle. This says nothing about the health any components of the his pukinje system. Sorry if I'm missing something really obvious, I'm just trying to understand the answer well for myself. | |||
Also, the second ECG (1B) demonstrates several features that argue in favour of an abberantly confucted supraventricular (probably junctional) rhythm for my mind. There is a very quick time to intrinsicoid and the axis is relatively normal. My understanding is that these are relatively unusual for ventricular rhythms. | |||
Thanks, I'd be interested to hear what you have to say. | |||
Josh | |||