https://www.vetsurgeon.org/f/clinical-questions/6615/tachycardia-in-a-10-yo-welsh-springer---advice-please I have a male (n) 10 yo Welsh Springer, presented with mild lethargy, however still bright and lively when brought into clinic. Only clinical exam finding is tachycardia - HR = 240bpm, pulses intact but slight, no murmurs, no right sided signs, no cyanosisen-USTelligent Community 10https://www.vetsurgeon.org/thread/26702?ContentTypeID=1Thu, 04 Nov 2010 12:09:17 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:1ff256fb-9828-4302-8f9b-bfebd5855255Richard Fox<p>+1 Rob - SVT/VTAC can be caused by a number of things. I&#39;d do a ECG and see if it is regular or irregular, Rads/ultrasound for gross changes before seeking meds&nbsp; :) Oopps sorry just repeated Robs post :)</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/26690?ContentTypeID=1Thu, 04 Nov 2010 09:41:43 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:7cb6fd45-d31c-4362-aeb4-36977063dd27Rob Reid<p>I would be trying to get a diagnosis before starting medication. It may well be that you get enough evidence from radiographs today, but I would certianly want at least an ECG as well&nbsp;- you want to find out if it is has an atrial fibrilation before you blindly start digoxin for example. Does this dog have an arrhythmia and if so is it regularly irregular or not?</p> <p>If the dog is displaying no overt clinical signs then it will probably be ok to be left for 24hrs, but I say probably as lack of clinical signs doesn&#39;t always indicate severity of disease and these can drop dead at any second!</p><div style="clear:both;"></div>