Diabetes Mellitus, Type 2 Clinical Trial
Official title:
Differences in Plaque Composition Evaluated Through Coronary Tomography in Subjects With Type 2 Diabetes With and Without Microvascular Complications
Adults with diabetes mellitus have 2-3 times fold increased cardiovascular (CV) risk compared to adults without diabetes, and the risk rises with the worsening of glycaemic control. Adults with type 2 diabetes mellitus (T2DM) and microvascular complications (DMCs) have a higher risk of CV complications than subjects without DMCs. 2023 European Society of Cardiology (ESC) guidelines stated that individuals with T2DM with target organ damage (TOD), defined as presence of microvascular disease in at least three different sites (e.g., microalbuminuria (stage A2) plus retinopathy plus neuropathy), should be considered into a very high CV risk category. Coronary artery calcium score (CACS) is a measure of the amount of calcium deposits in the coronary arteries obtained through a CT coronary imaging. CACS has become a widely available and accurate tool for determining the risk of major CV events. The specific role of DMCs in determining the features of coronary plaques is not completely known. A recent study showed how T2DM subjects with obstructive coronary artery disease (CAD) with DMCs at their first coronary event present a more "stable" coronary atherosclerosis features at OCT-imaging, as they have a higher prevalence of fibrous plaques and healed plaques with larger calcifications compared to those with T2DM and no DMCs. In this study only subjects with obstructive CAD (defined as a stenosis ≥50% in the left main coronary artery or any stenosis ≥70% or fractional flow reserve <0.80 in any other major epicardial vessel) were enrolled. Therefore, further research to evaluate differences in CACS in T2DM subjects with no previous history of CAD with and without DMCs is required. Aim of our study was to evaluate the presence of differences in the distribution and tomographic features of coronary plaques in T2DM subjects with no previous history of CAD with at least one DMCs, focusing on the degree of plaque calcification calculated by the CACS.
Subjects with T2DM who performed CT coronary imaging, as per clinical routine practice. They will be, therefore, divided into two groups: - Group A: subjects with T2DM with at least one DMC, as defined: • Retinopathy, defined as any diabetes related eye disease (macular oedema, severe non proliferative diabetic retinopathy, proliferative diabetic retinopathy) or previous history of retinal photocoagulation therapy and/or intravitreal injections of anti- vascular endothelial growth factor (VEGF) agents. - Neuropathy, including any diabetes-related neurological complication (diabetic peripheral neuropathy, diabetic autonomic neuropathy). - Nephropathy, defined as the presence of albuminuria (urinary albumin > 30 mg/g creatinine) and/or an estimated glomerular filtration rate < 60 mL/min/1.73 m2 - Group B: subjects with T2DM without DMCs. Following data will be collected Anthropometric parameters - Sex - Year of birth - Height, expressed in m - Weight, expressed in Kg - BMI, calculated as weight divided by height squared Vital signs - Blood pressure, expressed in mmHg; - Heart rate, expressed in bpm; - VFA (Visceral fat area - cm2); - SFA (subcutaneous fat area - cm2). Medical history - Date of diagnosis of diabetes, at least the year; - Comorbidities; - Year of diagnosis of comorbidities. - Smoking habits, defined as "current smoker", "former smoker", "never smoked" Medications - Diabetes medications; - Dose of each diabetes medications; - Year of start for each diabetes medications; - Concomitant medications; - Dose of each concomitant medications; - Year of start for each concomitant medication. Cardiovascular risk scores • SCORE2-Diabetes [12] Blood Tests data collection - HbA1c - Serum Creatinine - Total Cholesterol - LDL Cholesterol - HDL Cholesterol - Triglycerides - Transaminases - Microalbuminuria Blood sample collection • CRP Cardiovascular Autonomic Tests Following Cardiovascular autonomic tests will be performed: - Deep breathing: The patient sits quietly and breathes deeply at six breaths a minute (five seconds in and five seconds out) for one minute. An electrocardiogram is recorded throughout the period of deep breathing, with a marker used to indicate the onset of each inspiration and expiration. - Valsalva manoeuvre: The test is performed by the patient blowing into a mouth- piece connected to an aneroid manometer or a modified sphygmomanometer and holding it at a pressure of 40 mm Hg for 15 seconds while a continuous electrocardiogram is recorded. The manoeuvre is performed three times with one- minute intervals between. - Lying to standing: The test is performed by measuring the patient's blood pressure with a sphygmomanometer while he is lying down quietly and again when he stands up. The postural fall in blood pressure is taken as the difference between the systolic blood pressure lying and the systolic blood pressure standing [13]. Neuropathy evaluation - Michigan Neuropathy Screening Instrument (MNSI-Q) questionnaire [14] - COMPASS31 questionnaire [15] - Diabetic Neuropathy Index (DNI) questionnaire [16] - DN4 questionnaire [17] - Monofilament examination Ophthalmologic evaluation • Non mydriatic Ocular fundus photography Coronary CTA parameters collection - Total EAT - EAT of atrio_ventricular sulcus - EAT of anterior interventricular artery, both as volume and thickness - EAT of right coronary artery - EAT of circumfl ex coronary artery - EAT Volume Index (cm3/m2) - Perivascular FAI (-30 -190 UH) - CACS (Agatston score, Volume and mass) - Plaque grading/stenosis (Minimum, mild, intermediate, Severe), using CAD-RADS 2.0 - Plaque characteristics non-calcific, mixed and calcific plaque, evaluating any high-risk plaque profile ;
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