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The V-Tachogram:Decreasing Ventricular Arrythmias When Injecting Contrast in the Left Ventricle

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified September 2006 by Trillium Health Centre.
Recruitment status was:  Active, not recruiting
Information provided by:
Trillium Health Centre Identifier:
First received: February 7, 2006
Last updated: September 11, 2006
Last verified: September 2006
The purpose of this study is to determine if increasing the linear rise rate of injection of x-ray contrast in the heart during left ventriculograms(part of a cardiac Catheterization procedure) will decrease the incidence of arrythmias and improve image quality?

Condition Intervention Phase
Ventricular Arrythmias Procedure: lv injection of contrast Phase 1

Study Type: Observational
Study Design: Observational Model: Defined Population
Observational Model: Natural History
Time Perspective: Cross-Sectional
Time Perspective: Prospective

Further study details as provided by Trillium Health Centre:

Estimated Enrollment: 156
Study Start Date: July 2006
Estimated Study Completion Date: August 2006
Detailed Description:

The LV angiogram is performed frequently as part of the cardiac catheterization procedure. It is done by injecting a bolus of x-ray contrast into the ventricle through a pigtail catheter over a short period of time and observing the heart as it is pumped out. This provides information on regional wall motion abnormalities, ejection fraction, and mitral regurgitation. A common occurrence when performing a LV angio is frequent PVC’s or V-tach during the injection, it has been suggested that ectopic's occurs about 54% of the time and that interpretability was limited 30% of the time(3) This is rarely serious and subsides at the end of the injection but the irregularity of the contractions does affect the diagnostic quality of the exam.

In an attempt to decrease the incidence of ventricular ectopic's during the LV angiogram Contrast injections with a greater linear rise increasing the injection duration to at least ½ the flow rate, greater than previous settings should decrease the tension and the contrast jets coming out of the catheter, decreasing the fling of the catheter at the initiation of the injection. Whether this affects the quality of the angiogram with a pig tail vs. a straight catheter will also need to be considered?


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Only ventriculograms that the operator deems necessary for the booked procedure will be considered. Only operators agreeing to the for mentioned settings will participate in the study. Patients will be randomized consecutively and should conclude in 3 to 4 weeks.

Exclusion Criteria:

  • Patients with aortic valve disease, a-fib, and frequent benign ectopic beats and patients unable to follow instructions to stop breathing will be excluded.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00288756

Canada, Ontario
Trillium Health Centre
Mississauga, Ontario, Canada, L5B 1B8
Sponsors and Collaborators
Trillium Health Centre
Principal Investigator: Peter Vandermyden, RN staff RN Trillium Health Centre
  More Information Identifier: NCT00288756     History of Changes
Other Study ID Numbers: 01
Study First Received: February 7, 2006
Last Updated: September 11, 2006

Keywords provided by Trillium Health Centre:
arrythmias processed this record on August 17, 2017