1/ Today's 🧵is about "Premature Atrial Complex (PAC)".

The aim of this thread is to refresh basic concepts that may help you to identify the different types of PACs.

I will explain it in a simple way with classic examples.

#CardioTwitter #ekgdx @ekgdx 2/ PAC occurs when an ectopic focus within the atria, generates an action potential before the next scheduled sinus beat.

In general:

*PAC can be Conducted normally, Aberrantly conducted or Blocked (non-conducted).
*PAC can be conducted with short PR, normal PR or long PR interval.

Let's start with a conducted #PAC that presents RBBB #aberrancy.

#ekgdx @ekgdx

1/ Today's 🧵is about "VT" versus "SVT with aberrancy".

The aim of this thread is to provide basic tips on how to apply some of the most used criteria that might be helpful in diagnosing VT. #CardioTwitter

Note that the following features are suggestive of VT, but their absence does not exclude VT.

@ekgdx 2/ History

In 1960 Dr. Alfred Pick and Richard Langendorf published, “Differentiation of supraventricular and ventricular tachycardia.” Sixty years later, differential diagnosis of wide QRS tachycardia on the electrocardiogram remains a challenging exercise.

Article:

@ekgdxsciencedirect.com/science/articl…

1/ Today's 🧵 is about the premature ventricular complex (#PVC).

The objective of this post is to refresh basic concepts. I will explain it in a simple way with classic examples that may help you. #CardioTwitter

@ekgdx 2/ Criteria

Premature ventricular complex occurs when a premature beat arises from an ectopic focus within the ventricles. In the majority of cases, PVCs have no known cause and may occur spontaneously.

1/ Today's 🧵 is about the de #Winter pattern.

The objective of this post is to help you understand a little more about this pattern with good examples, as well as remember its history.

@ekgdx 2/  The de Winter pattern holds significance as it is linked to the occlusion of the proximal left anterior descending coronary artery (LAD) when identified in the electrocardiogram (ECG) of individuals experiencing chest pain or displaying a history suggestive of acute coronary syndrome. In fact, this pattern is present in approximately 2% of patients diagnosed with proximal occlusion of the LAD.

ekgdx.com/board/ekg

1/ Today's 🧵 is about the #pacemaker basics.

The objective of this post is to clarify several doubts in a simple way. #CardioTwitter

I will explain it with simple steps and classic examples so you can understand better. 

@ekgdx 2/ Step 1: Identify the chamber(s) paced.

Let's look at the classic examples.

A spike occurring before the P wave usually indicates atrial pacing.

1/ Today's 🧵is about EKG Challenges.

It is dedicated to those who need to take their #ECG skills to the next level and all #cardiology fellows in training. #CardioTwitter

@ekgdx 2/ The section of EKG Challenges from @ekgdx is located at:

We added new features that has been requested by thousands of our students across the world.

1- You can mimic the Cardiology Board (timed test)
2- You can practice with any question at any time. ekgdx.com/board/ekg

1/ Today's 🧵 is about the #Sgarbossa Criteria and #Concordance vs #Discordance in simple words.

The objective of this post is to clarify any doubts in a simple, graphic and didactic way. #CardioTwitter @ekgdx 2/ The Sgarbossa criteria were initially introduced over two decades ago to enhance the diagnostic precision for MI in the setting of LBBB. This criteria is widely accepted as one of the most valuable tools to assist in the diagnosis of MI when LBBB is present.

Here you can see a classic example with graphic explanations that will facilitate understanding.

1/x
If you have difficulty interpreting an ECG, I will explain the basic method that I use, and I am sure it will help you. It's called the basic "method of Dr. Roig". Here we go.. 2/x
R-ate
The first step is to calculate the HR.
Total QRS x 6 = HR.
If HR > 100 bpm = Tachycardia.
If HR < 60 bpm = Bradycardia.