2009 Bradycardia Tachycardia 
EMS 12-Lead
JULY 21, 2022
Original publication date July, 2009. We have borderline sinus bradycardia with 1 ° AVB and occasional PACs. If this was a tachycardia at a rate of 150, it might appear to be a narrow complex tachycardia, when in fact, it would be a wide complex tachycardia! Is that a supraventricular rhythm?
Dr. Smith's ECG Blog
APRIL 8, 2015
If the patient has Abnormal Vital Signs (fever, hypotension, tachycardia, or tachypnea, or hypoxemia), then these are the primary issue to address, as there is ongoing pathology which must be identified. Thus, if there is documented sinus bradycardia, and no suspicion of high grade AV block, at the time of the syncope, this is very useful.
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