Fridericia Formula
Fridericia Formula for calculating the QT interval on an (ECG) according to heart rate, described in 1920. Louis Sigurd Fridericia (1881-1947)
Tag EKG
ECG Case 137
The monitor alarms "extreme ventricular tachycardia". There are three features on this rhythm strip that suggest artefact -- can you spot them?
ECG Case 136
A woman in her 60s with a broad complex tachycardia. There are two ECG features that suggest an accessory pathway, can you spot them?
ECG Case 135
A single agent overdose causing AV blockade, QRS widening, and QT prolongation.... but reports of death only if QRS > 200ms. Which medication is this?
ECG Case 134
Crushing chest pain and diaphoresis. New inferior Q waves and T-wave inversion, yet this is a normal ECG. Can you explain why?
ECG Case 133
Chest pain, shock and ST elevation in aVR. The LAST place this patient needs to be is in the cath lab
ECG Case 132
A negative troponin, resolved chest pain, and a "normal" ECG does not exclude ACS requiring emergent intervention
ECG Case 131
An 88-year-old man with palpitations and a HR fixed at 150. This is not flutter or AVNRT -- can you explain why?
ECG Case 130
Yet another ED patient with SVT -- but there is one feature on this ECG that suggests a congenital structural abnormality, can you spot it?
ECG Case 129
A man in his 40s with exertional chest pain and a small troponin rise. Is this just LVH? Bedside echo gives us the answer
ECG Case 128
There are five features on this "normal" ECG that suggest impending inferior STEMI - can you spot them?
ECG Case 127
Can ST depression and T wave inversion in aVL be normal? Can BER cause reciprocal changes? Learn about using the QRS-T wave angle to answer these questions