The V-Tachogram:Decreasing Ventricular Arrythmias When Injecting Contrast in the Left Ventricle
This trial is active, not recruiting.
|Treatment||lv injection of contrast|
|Sponsor||Trillium Health Centre|
|Start date||July 2006|
|End date||August 2006|
|Trial size||156 participants|
|Trial identifier||NCT00288756, 01|
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?
|Observational model||defined population|
Male or female participants of any age.
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.
|Principal investigator||Peter Vandermyden, RN|
|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?|
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