Ventricular Arrythmias Clinical Trial
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?
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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Observational Model: Defined Population, Time Perspective: Cross-Sectional
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