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Digitalis Investigation Group (DIG)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
ClinicalTrials.gov Identifier: NCT00000476
Recruitment Status : Completed
First Posted : October 28, 1999
Last Update Posted : July 12, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Tracking Information
First Submitted Date  ICMJE October 27, 1999
First Posted Date  ICMJE October 28, 1999
Last Update Posted Date July 12, 2016
Study Start Date  ICMJE June 1990
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE Not Provided
Original Primary Outcome Measures  ICMJE Not Provided
Change History
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title  ICMJE Digitalis Investigation Group (DIG)
Official Title  ICMJE Not Provided
Brief Summary To determine if digitalis had a beneficial, harmful, or no effect on total mortality in patients with clinical heart failure and sinus rhythm.
Detailed Description


Despite widespread use of digitalis and its availability for nearly two centuries, uncertainty surrounded the appropriateness of its role and value in treating congestive heart failure patients in sinus rhythm. The study was a multicenter collaborative effort with the Department of Veteran Affairs Cooperative Studies Program which provided support for a data coordinating center and a pharmacy coordinating center.


Randomized, double-blind, simple, multicenter, international trial with 186 centers in the United States and 116 in Canada. In the main trial, patients with left ventricular ejection fractions of 0.45 or less were randomly assigned to digoxin (3397 patients) or placebo (3403 patients) in addition to diuretics and ACE inhibitors. In an ancillary trial of patients with ejection fractions greater than 0.45, 492 patients were randomly assigned to digoxin and 496 to placebo. Patients were recruited over a three-year period at the 302 centers and followed for a minimum of two years. Patient enrollment began in February 1991 and ended in September 1993. Follow-up ended in December 1995. The main results paper was published in 1997.

Three substudies were conducted. The quality of life/6-minute walk test substudy determined the effect of treatment on a patient's well-being, daily activities, and functional status. The Holter/signal averaging electrocardiogram substudy examined the pathophysiology of sudden cardiac death. The neurohormonal substudy determined whether long-term administration of digoxin attenuated the neuroendocrine response in patients with heart failure.

The study completion date listed in this record was obtained from the "Completed Date" entered in the Query View Report System (QVR).

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 3
Study Design  ICMJE Allocation: Randomized
Masking: Double
Primary Purpose: Treatment
Condition  ICMJE
  • Arrhythmia
  • Cardiovascular Diseases
  • Heart Diseases
  • Heart Failure, Congestive
  • Sinus Arrhythmia
  • Heart Failure
Intervention  ICMJE Drug: digitalis
Study Arms  ICMJE Not Provided
Publications *

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status  ICMJE Completed
Enrollment  ICMJE Not Provided
Original Enrollment  ICMJE Not Provided
Actual Study Completion Date  ICMJE June 1998
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE Men and women with clinical heart failure, sinus rhythm, and an ejection fraction less than or equal to 45 percent.
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 21 Years to 75 Years   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Not Provided
Removed Location Countries  
Administrative Information
NCT Number  ICMJE NCT00000476
Other Study ID Numbers  ICMJE 65
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Current Responsible Party Not Provided
Original Responsible Party Same as current
Current Study Sponsor  ICMJE National Heart, Lung, and Blood Institute (NHLBI)
Original Study Sponsor  ICMJE Same as current
Collaborators  ICMJE Not Provided
Investigators  ICMJE
Investigator: No Collins US Department of Veterans Affairs
Investigator: No Fye US Department of Veterans Affairs
PRS Account National Heart, Lung, and Blood Institute (NHLBI)
Verification Date November 2005

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP