Related Experiment Videos
[Complex ventricular arrhythmias in ischemic heart disease]
W Piwowarska1, M Sniezek-Maciejewska, M Trusz-Gluza
1I Klinika Kardiologii IK Sl. AM w Katowicach.
Insights
Patients with ischemic heart disease and severe ventricular arrhythmias often experience more frequent myocardial infarctions, pain, and reduced heart function. Complex arrhythmias correlate with poorer clinical outcomes and silent ischemia.
Area of Science:
- Cardiology
- Electrophysiology
- Internal Medicine
Context:
- Ischemic heart disease (IHD) is a leading cause of mortality worldwide.
- Ventricular arrhythmias are a common complication of IHD, increasing mortality risk.
- Accurate assessment of arrhythmia severity is crucial for patient management.
Purpose:
- To describe the clinical characteristics of patients with ischemic heart disease (IHD).
- To correlate the severity of ventricular arrhythmias, graded by Lown's classification, with clinical manifestations in IHD patients.
- To identify predictors of complex arrhythmias in this population.
Summary:
- This study analyzed 856 IHD patients, assessing ventricular arrhythmias using Holter monitoring and Lown's grading.
- Patients with complex ventricular arrhythmias (Lown's grade 3-5) exhibited higher rates of previous myocardial infarction, syncope, ventricular tachycardia/fibrillation, and reduced cardiac function (contractility index, ejection fraction).
- Silent myocardial ischemia during exercise was common in patients with complex arrhythmias.
Impact:
- Highlights the significant clinical differences between patients with simple and complex ventricular arrhythmias in IHD.
- Emphasizes the association between complex arrhythmias and adverse cardiac events and reduced cardiac function.
- Informs risk stratification and management strategies for IHD patients with ventricular arrhythmias.
Abstract:
The purpose of the study was to describe the clinical picture in patients with ischemic heart disease (IHD) and verifying severity of ventricular arrhythmias. The study included 856 patients with IHD aged 23-88 years (mean = 55.3), including 659 men and 197 women. Holter monitoring was performed in all patients. Ventricular arrhythmias were graded according to Lown. The patients were divided into five groups: group 1-349 patients with Lown's grade 1 and 2; group 2-95 patients with grade 3; group 3-152 patients with grade 4a and 4b; group 4-11 patients with grade 5; group 5-507 patients (selected from groups 2, 3 and 4) with Lown's grade 3 and 4 or 5. Arterial hypertension was found in 17.1%, myocardial infraction in 66%, and syncope in 12.3% of the patients. The patients with complex ventricular arrhythmias versus Lown's grade 1 and 2 show significant differences especially in respect to: the frequency of previous anterior myocardial infraction, the incidence of pain at rest, loss consciousness, the frequency of ventricular tachycardia and fibrillation, anginal pain and exercise-related arrhythmias. The patients with Lown's ventricular arrhythmia grade 3-5 do not differ significantly in their clinical manifestations of IHD from the patients with ventricular arrhythmias grade from 3 to 5. The development of silent myocardial ischemia during exercise stress testing is typical also for the patients with complex ventricular arrhythmias. A decreased contractility index, ejection fraction and dyskinesis are significantly more frequent in the patients with complex ventricular arrhythmias.