Study hypothesis: cardiac autonomic dysfunction may affect vaso vagal syncope recurrences in type 2 patients with diabetes vs. patients without diabetes. Background: vaso vagal syncope and its recurrences may be due to alterations in autonomic system function, that may be more frequent in diabetics. Heart rate variability (HRV) is a valid test to study sympathetic and vaso vagal tone dysfunction. However, in this study authors investigated the correlation between HRV alterations and diabetes in a population of patients affected by syncope, and classified as vaso vagal syncope by Head Up Tilt Test (HUT) exam. Secondly, authors assessed these alterations as causes of vaso vagal syncope recurring at 12 months of follow up in type 2 patients with diabetes under sodium-glucose transporter 2 inhibitors (SGLT2-inhibitors) vs. other hypoglycemic drugs .. Materials and Methods: In a multicenter study authors studied T2DM patients under SGLT2-I therapy (n 426) vs. those that did not receive the SGLT2-I therapy (n 2195), and affectede by vaso vagal syncope. All enrolled patients were in stable sinus rate before to perform ECG Holter, and the Head Up Tilt Test (HUT). However, before to perform the HUT all patients performed a 24 hours ECG Holter, to asses sinus rhythm , heart rate, and HRV. Then, these patients performed a 123I-metaiodobenzylguanidine (123I-MIBG) myocardial scintigraphy to assess cardiac autonomic dysfunction. Moreover, authors performed a propensity score matching (PSM) analysis to evaluate 160 SGLT2-I users vs. 160 Non-SGLT2-I users' patients.
Age range
18 Years – 75 Years
Sex
ALL
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syncope recurrence
Timeframe: 12 months.