Ecg Axis Interpretation on ECG Library – LITFL Basics

ECG Axis Interpretation

Sun, 17 Nov 2024 00:00:00 +0000

Cardiac axis represents the sum of depolarisation vectors generated by individual cardiac myocytes. Clinically is is reflected by the ventricular axis, and interpretation relies on determining the relationship between the QRS axis and limb leads of the ECG (below diagram)

Since the left ventricle makes up most of the heart muscle under normal circumstances, normal cardiac axis is directed downward and slightly to the left:

Normal Axis = QRS axis between -30° and +90°.

Abnormal axis deviation, indicating underlying pathology, is demonstrated by:

Cardiac Axis Trainer

Tue, 10 May 2022 00:00:00 +0000

Learning cardiac axis interpretation can be tedious.

I have created an open source webapp hosted on CardiacAxis.com. Here you will be able to analyse in English and German the ECG variations with axis deviation.

The Axis trainer online is interactive and the arrow can be moved to demonstrate each of the specific QRS complex changes. Bookmark to your phone homepage and try it out for yourself. Below is a quick demonstration through 360 degrees…

ECG Exam Template

Tue, 03 May 2022 00:00:00 +0000

The following headings and prompts can be used as template for ECG-based exam questions.

Amjid Rehman (@amjidrehman) has made an easy interactive online template ‘ECG made easier‘ based on the template structure outlined

ECG type and recording

12 lead vs rhythm strip, rate (normal 25 mm/s)
Calibration (5mm wide, 10mm high = 1mV)
Unusual leads – right, posterior, lead grouping format

Rate

normal 60 – 100/min
tachy/bradycardia (SA node) vs –arrhythmia (not SA node)
method: 300/RR interval (large squares) or number of QRS complexes x 6 (if 25mm/s)

ECG Interpretation: The Basics

Wed, 16 Jun 2021 00:00:00 +0000

Part one of a 5 part lecture series on the basics of ECG/EKG Interpretation with Dr Theo Sklavos and cardiologist A/Prof William Wang. This lecture series is aimed primarily at medical/nursing/paramedicine students and junior trainees, but will hopefully be useful as a refresher course for those with previous experience.

The Basics

In this first video we walk you through every aspect of the basics of the ECG including:

Describe the parts of the ECG
Rate, rhythm, axis
P wave, PR interval, QRS complex, ST-segment, T wave, QT interval
Identify the features of a normal ECG

ECG Interpretation lectures

References and further reading

ECG LIBRARY