Cardiac Arrhythmia Pilot Study (CAPS)

Status Completed

Clinical Trial Summary

To compare the effectiveness of various drugs and drug combinations in suppressing complex ventricular arrhythmias, and to evaluate their safety.

Clinical Trial Description

BACKGROUND:

Epidemiologic studies had indicated that complex ventricular premature beats made an independent contribution to risk of sudden death in survivors of a myocardial infarction (MI), and did not appear to be merely a reflection of their association with relatively severe myocardial damage. The potential for reduction in mortality by identification and administration of drugs capable of safely suppressing ventricular arrhythmias was tremendous. In 1982, there was incomplete knowledge regarding which types of ventricular arrhythmias responded to various kinds of drugs. A pilot study of antiarrhythmic agents helped clarify this issue.

Numerous antiarrhythmic agents with differing pharmacologic properties and side effects had been shown to suppress ventricular arrhythmias. It had also been postulated that antiarrhythmics might raise an individual's threshold for experiencing ventricular fibrillation. There had been several published reports of large (at least l00 patients), long-term clinical trials of antiarrhythmic agents in post-MI patients. None of these had yielded statistically significant results using mortality as the response variable. This might have been due to incorrect drug selection, inadequate sample size, inappropriate choice of patients, or the lack of impact of arrhythmia treatment on mortality.

Due to incomplete knowledge as to which drug(s) and combinations of drugs were most effective, it was considered to be premature to undertake a full scale trial in 1981-1982. However, the public health problem was of sufficient magnitude to warrant a pilot study to learn more about the efficacy and safety of various antiarrhythmic drugs singly or in combination.

The protocol planning phase began in October l982. Patient recruitment started in July l983 and ended in the summer of 1985. Each patient was followed for one year.

DESIGN NARRATIVE:

Randomized, double-blind, fixed sample. A total of 502 patients were randomly assigned to 5 treatment groups consisting of encainide, ethmozine, flecainide, imipramine, and placebo. ;

Study Design

Allocation: Randomized, Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT00000504
Study type	Interventional
Source	National Heart, Lung, and Blood Institute (NHLBI)
Contact
Status	Completed
Phase	Phase 2
Start date	September 1982
Completion date	September 1985

View Details

See also
Status	Clinical Trial	Phase
Recruiting	`NCT05654272` - Development of CIRC Technologies
Recruiting	`NCT05650307` - CV Imaging of Metabolic Interventions
Recruiting	`NCT04515303` - Digital Intervention Participation in DASH
Completed	`NCT04056208` - Pistachios Blood Sugar Control, Heart and Gut Health	Phase 2
Recruiting	`NCT04417387` - The Genetics and Vascular Health Check Study (GENVASC) Aims to Help Determine Whether Gathering Genetic Information Can Improve the Prediction of Risk of Coronary Artery Disease (CAD)
Not yet recruiting	`NCT06211361` - Cardiac Rehabilitation Program in Patients With Cardiovascular Disease	N/A
Not yet recruiting	`NCT06032572` - Evaluation of the Safety and Effectiveness of the VRS100 System in PCI (ESSENCE)	N/A
Recruiting	`NCT04514445` - The BRAVE Study- The Identification of Genetic Variants Associated With Bicuspid Aortic Valve Using a Combination of Case-control and Family-based Approaches.
Enrolling by invitation	`NCT04253054` - Chinese Multi-provincial Cohort Study-Beijing Project
Completed	`NCT03273972` - INvestigating the Lowest Threshold of Vascular bENefits From LDL Lowering With a PCSK9 InhibiTor in healthY Volunteers	N/A
Completed	`NCT03680638` - The Effect of Antioxidants on Skin Blood Flow During Local Heating	Phase 1
Recruiting	`NCT04843891` - Evaluation of PET Probe [64]Cu-Macrin in Cardiovascular Disease, Cancer and Sarcoidosis.	Phase 1
Completed	`NCT04083846` - Clinical Study to Investigate the Pharmacokinetic Profiles and Safety of High-dose CKD-385 in Healthy Volunteers(Fed)	Phase 1
Completed	`NCT04083872` - Clinical Study to Investigate the Pharmacokinetic Profiles and Safety of Highdose CKD-385 in Healthy Volunteers(Fasting)	Phase 1
Completed	`NCT03693365` - Fluid Responsiveness Tested by the Effective Pulmonary Blood Flow During a Positive End-expiratory Trial
Completed	`NCT03619148` - The Incidence of Respiratory Symptoms Associated With the Use of HFNO	N/A
Completed	`NCT03466333` - Postnatal Enalapril to Improve Cardiovascular fUnction Following Preterm Pre-eclampsia	Phase 2
Completed	`NCT04082585` - Total Health Improvement Program Research Project
Completed	`NCT05132998` - Impact of a Comprehensive Cardiac Rehabilitation Program Framework Among High Cardiovascular Risk Cancer Survivors	N/A
Completed	`NCT05067114` - Solutions for Atrial Fibrillation Edvocacy (SAFE)

Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.