How do you read an ECG amboss?

How do you read an ECG amboss?

Approach to ECG interpretation

1. Heart rhythm (best seen in lead II)
2. Heart rate. (any lead)
3. Cardiac axis (leads I and aVF)
4. P-wave.
5. PR-interval duration (best seen in lead II)
6. QRS-complex morphology and duration (assessed in all leads individually)
7. ST-segment morphology (assessed in all leads individually)
8. T-wave.

What is the isoelectric line of the ECG?

ECG Waveforms. The baseline or isoelectric line. This is represented as a straight line on the ECG paper where there is no positive or negative charges of electricity to create deflections. Waveforms. These are representations of electrical activity created by depolarization and repolarization of the atria and …

What is a junctional rhythm?

A junctional rhythm is where the heartbeat originates from the AV node or His bundle, which lies within the tissue at the junction of the atria and the ventricle. Generally, in sinus rhythm, a heartbeat is originated at the SA node.

How do you find isoelectric line?

Find the isoelectric line (baseline) of the cardiac cycle by looking at the T-P segment. (Some references suggest finding the isoelectric line by looking at the PR segment.2) Measure the height (amplitude) of the ST segment from the isoelectric line at the J point in mm (each small box is 1 mm) (see J point elevation).

What is isoelectric ST segment?

The ST segment is the flat, isoelectric section of the ECG between the end of the S wave (the J point) and the beginning of the T wave. The ST Segment represents the interval between ventricular depolarization and repolarization.

What does an inverted ECG mean?

There are many reasons why T-waves can be inverted. We can see inverted T-waves, for instance, in the midst of a heart attack and in structural heart disease, such as coronary ischemia or left ventricular hypertrophy.

What causes negative deflection in ECG?

Axis refers to the direction of the main vector in which depolarization occurs. A wave that travels toward a positive lead will result in an upward or positive deflection (tracing) on the ECG, and a wave traveling away from a positive lead will result in a downward or negative deflection.

What is basic ECG rhythm interpretation?

Basic ECG Rhythm Interpretation Objectives At the completion of this course the learner will be able to: 1. Identify the sequence of normal electrical activation of the heart. 2. Describe the physiology of cardiac muscle contraction. 3.

What is PR interval on EKG rhythm strips?

Interpreting EKG Rhythm Strips Step 4 – PR Interval Measures the time interval from the onset of atrial contraction to onset of ventricular contraction Measured from onset of P wave to the onset of the QRS complex Normal interval is 0.12–0.20 seconds (3-5 small squares)

What does arrhythmia mean on EKG?

Arrhythmia- Absence of heart rhythm Artifact – Man-made disturbance in the EKG tracing; due to poor electrode contact or muscle activity originating outside the heart. Dysrhythmia- A disturbance in the heart rhythm (abnormality)

How does an EKG detect dysrhythmia?

An EKG uses electrodes attached to the skin to detect electric current moving through the heart. These signals are transmitted to produce a record of cardiac activity. Arrhythmia or dysrhythmia are disturbances in the normal cardiac rhythm of the heart which occurs as a result of alterations within the conduction of electrical impulses.