Electrocardiographic features of ventricular preexcitation
Apr 10, 2023
Source: Cainiu Health
Dr. Tian Hongbo
Introduction
Ventricular pre-excitation usually refers to pre-excitation syndrome. The characteristic electrocardiographic (ECG) feature of pre-excitation syndrome is the presence of a broad and distorted QRS complex, along with changes in the QT interval. On ECG, pre-excitation syndrome typically shows a QRS duration greater than 0.11 seconds, with a slurred upstroke known as a delta wave at the beginning of the QRS complex. It is also associated with a shortened PR interval and predisposes to episodes of abnormal, wide QRS complex tachycardias.
Ventricular pre-excitation usually refers to pre-excitation syndrome. On electrocardiogram (ECG), the characteristic feature of pre-excitation syndrome is the presence of widened and abnormally shaped QRS complexes, along with changes in the QT interval.
On ECG, pre-excitation syndrome typically shows a QRS duration greater than 0.11 seconds, with a slurred upstroke known as a delta wave at the beginning of the QRS complex. It also leads to a shortened PR interval and is prone to producing runs of abnormally wide QRS complexes. Pre-excitation commonly occurs at the base of the left or right ventricle and may show upward progression of the QRS complexes across the precordial leads.
Pre-excitation syndrome often causes symptoms such as palpitations, shortness of breath, or heart failure. As the condition progresses, there is a risk of sudden cardiac death. It is recommended to seek medical evaluation early, follow physician guidance, and consider treatment with catheter ablation. During treatment, patients should get adequate bed rest, avoid anxiety or stress, and limit intake of high-fat foods such as french fries and fried chicken, to prevent加重 the burden on the body.
