Dr. Jones’s ECG Blog

Blog for advanced ECG interpretation

March 3, 2018

A Word About Junctional Complexes

Some ectopic QRS complexes – especially junctional ectopic complexes – can look very much like the sinus conducted beats or atrial ectopic impulses. It is very […]
March 3, 2018

Premature Atrial Complexes

This post is short and to the point: premature atrial complexes (PACs) do not have to resemble the sinus P waves and, should they arise from […]
March 3, 2018

Which Way Should the Repolarization Abnormality Point?

OK. You've got an abnormal QRS complex followed by a repolarization abnormality (RA). Which direction should the repolarization abnormality point? As a young resident, I was […]
March 2, 2018

Jones’s Rule and Subendocardial Ischemia

Jones's Rule... Any ST depression in the 12- lead ECG of a patient with credible chest pain (symptoms suggestive of an Acute Coronary Syndrome) represents a […]
March 2, 2018

Is It Really Third Degree AV Block?

Typically, when I ask a class how one recognizes 3rd degree AV block, they respond with “the P waves and the QRS complexes are unrelated to […]
March 2, 2018

Jones’s Sign

Normal ST segments manifest a gentle rise into the T wave with a slight upward concavity. The junction of the end of the ST segment and […]