What is the diagnosis on this ECG?

RE: What is the diagnosis on this ECG?

Martin Atkinson — Mon, 07 Jan 2019 14:15:15 GMT

I can see some P waves as well so this looks like bradycardia/tachycardia form of sick sinus syndrome. Where there is a normal looking P wave a QRS does usually follow so I don't think there is a concurrent AV block.

RE: What is the diagnosis on this ECG?

Alistair Graham-Evans — Mon, 07 Jan 2019 06:49:22 GMT

In an ideal world ( which it isn't ) I'd like to see a longer Lead 2 trace with less artifact but with type of dog and history with long periods of sinus arrest alternating with supraventricular tachycardia I would be considering sick sinus syndrome. Sadly.

RE: What is the diagnosis on this ECG?

Liz Barton — Sun, 06 Jan 2019 21:09:51 GMT

I would have said supraventricular tachycardia - the R-R intervals look too regular to me to be AF. And AF sounds classically jungle-drum with variable pulses, which is pretty classic on auscultation. Not sure what's happening during the long pauses - I'm presuming there was no association with respiratory rate as as a HR of 250 sounds way too high to have any degree of sinus arrhythmia.

It also looks like there are P waves to me, in certain leads (red circles below), but too soon after the QRST to be part of a normally conducted complex.

RE: What is the diagnosis on this ECG?

David Mills — Sun, 06 Jan 2019 17:58:42 GMT

Atrial fibrillation.