Henry Cuthbert Bazett (1885 – 1950) was an English physiologist. Eponym: Bazett's formula to calculate QTc interval for varying heart rates
Fridericia Formula for calculating the QT interval on an (ECG) according to heart rate, described in 1920. Louis Sigurd Fridericia (1881-1947)
The monitor alarms "extreme ventricular tachycardia". There are three features on this rhythm strip that suggest artefact -- can you spot them?
A woman in her 60s with a broad complex tachycardia. There are two ECG features that suggest an accessory pathway, can you spot them?
A single agent overdose causing AV blockade, QRS widening, and QT prolongation.... but reports of death only if QRS > 200ms. Which medication is this?
Crushing chest pain and diaphoresis. New inferior Q waves and T-wave inversion, yet this is a normal ECG. Can you explain why?
Chest pain, shock and ST elevation in aVR. The LAST place this patient needs to be is in the cath lab
A negative troponin, resolved chest pain, and a "normal" ECG does not exclude ACS requiring emergent intervention
An 88-year-old man with palpitations and a HR fixed at 150. This is not flutter or AVNRT -- can you explain why?
Yet another ED patient with SVT -- but there is one feature on this ECG that suggests a congenital structural abnormality, can you spot it?
A man in his 40s with exertional chest pain and a small troponin rise. Is this just LVH? Bedside echo gives us the answer
There are five features on this "normal" ECG that suggest impending inferior STEMI - can you spot them?