Hemodialysis Clinical Trial
Official title:
Investigation of Electrophysiological Substrate of Arrhythmia in Hemodialysis Patients
Patients receiving dialysis for kidney failure suffer from very high rates of sudden cardiac death due to abnormal heart rhythms and perfusion defects associated with HD treatment. It has previously been recognized that patients suffer heart injury during the dialysis procedure which may be an important factor for investigation. The study uses a simple implantable device that can monitor heart rhythms over time to gather information on the type of abnormal rhythms that occur in dialysis patients. This information will be combined with ultrasound and x-ray scans of the heart that will also be collected. The goal is to understand the relationship between the abnormal rhythms and injury to the heart during dialysis and what causes these injuries. The information gathered in this study will be used to compare the accuracy of an in house personalized computational model to predict potential cardiac injuries when patients undergo HD treatment.
This is an exploratory, single group, observational study involving patients recruited from the dialysis patient population of the London Health Science Centre (LHSC) Regional Renal Program. Recruited patients will undergo insertion of the Reveal LINQ insertable cardiac monitoring system and will continuously be examined over a time period of up to 12 to 24 months to gather data on the incidence of arrhythmia. Those patients enrolled into the study will have their first study session on their midweek dialysis treatment day (Wednesday or Thursday) at St. Joseph's Hospital. During the first study visit, all participants will have an external multichannel ECG, CT scan, CT angiogram, and 2D echo done. In addition to this, all participants will have non-invasive monitoring of circulatory stress using the CVInsight contact device, and blood work will be drawn. Within one month, all participants will have a second study visit where they will undergo the same study procedures as in session one with the addition of up to 30 minutes of intradialytic exercise. This visit will also take place at St. Joseph's Hospital on a mid-week dialysis treatment day. If a patient would like to, they will then undergo an insertion procedure of the Reveal LINQ insertable cardiac monitoring system on a dialysis or non-dialysis treatment day at University Hospital. Dr. Allan Skanes (CoInvestigator) will perform this procedure at his earliest convenience. The implantable loop recorder will be interrogated at least once a month for up to 12 months to retrieve the information that has been recorded during their hemodialysis treatment. During this time, the patient participant will complete a questionnaire too using the LEVIL application. Then, 12 months after the initial insertion of the device, a follow-up call will be completed by a member of the research team where the patient will have the choice to have the device removed if desired. If the patient chooses to keep the device, we will monitor the implantable loop recorder for another year and the patient will be transferred to LHSC's Inherited Heart Rhythm Clinic at University Hospital for clinical monitoring after this. Completion of the questionnaire will continue during this time. If they choose to have the device removed, the cardiac electrophysiologist will remove the device at his earliest convenience. Bloodwork will be obtained pre and post dialysis as well as at peak stress of each imaging session. This will allow us to assess for relevant biomarkers of oxidative stress, myocardial ischemia, and volume overload. ;
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