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Schizophrenia patients at high risk of cardiovascular autonomic neuropathy: Study
Cardiovascular autonomic neuropathy (CAN) is an independent predictor of cardiovascular disease (CVD) in patients with diabetes as well as in patients with pre-diabetes and metabolic syndrome. Patients with schizophrenia have an increased rate of metabolic syndrome, pre-diabetes and diabetes as compared to the general population. Despite of this, occurrence CAN has not been investigated in patient with schizophrenia.
According to recently published research data in Nordic Journal of Psychiatry, cardiovascular autonomic neuropathy (CAN) is noted as highly prevalent in patients with schizophrenia.
"Testing for CAN is feasible and might be a new clinically tool for detecting early stages of CVD in patients with schizophrenia."the research team further opined.
Cardiovascular autonomic neuropathy (CAN) is an independent predictor of cardiovascular disease (CVD) in patients with diabetes as well as in patients with pre-diabetes and metabolic syndrome. The majority of excess mortality among people with schizophrenia seems to be caused by cardiovascular complications, and in particular, coronary heart disease. In addition, the prevalence of heart failure and arrhythmias is increased in this population. Reduced efferent vagal activity, which has been consistently described in these patients and their healthy first-degree relatives, might be one important mechanism contributing to their increased cardiac mortality. A decrease in heart rate variability and complexity was often shown in unmedicated patients when compared to healthy controls. In addition, faster breathing rates, accompanied by shallow breathing, seem to influence autonomic cardiac functioning in acute unmedicated patients substantially. Moreover, low-physical fitness is a further and independent cardiac risk factor present in this patient population.Patients with schizophrenia have an increased rate of metabolic syndrome, pre-diabetes and diabetes as compared to the general population. Despite of this, occurrence CAN has not been investigated in patient with schizophrenia.
With such limited background, the aims of this study were (1) to evaluate the feasibility testing for CAN with a new clinical tool and (2) report the prevalence of early and manifest CAN in patients with schizophrenia.
For the study protocol, Patients with diagnosed schizophrenia and with a disease duration ≥10 years were matched 1:1 on age and gender at screening with psychiatric healthy controls. CAN was defined as ≥ two abnormal standard cardiovascular autonomic reflex tests (lying-to-standing, deep breathing, and Valsalva maneuver) using the VagusTM device. A total of 46 patients with schizophrenia were included and matched to psychiatric healthy controls.
Results highlighted some new facts.
- Manifest CAN were more frequently presented in patients with schizophrenia (39% vs. 6% for controls, p<.0001).
- Sensitivity analysis of 41 subjects with schizophrenia without diabetes matched to 41 psychiatric healthy controls, showed similar results (37% vs. 5% for controls, p<.0001).
For full article follow the link: https://doi.org/10.1080/08039488.2021.1902566
Source: Nordic Journal of Psychiatry
Dr Satabdi Saha (BDS, MDS) is a practicing pediatric dentist with a keen interest in new medical researches and updates. She has completed her BDS from North Bengal Dental College ,Darjeeling. Then she went on to secure an ALL INDIA NEET PG rank and completed her MDS from the first dental college in the country – Dr R. Ahmed Dental College and Hospital. She is currently attached to The Marwari Relief Society Hospital as a consultant along with private practice of 2 years. She has published scientific papers in national and international journals. Her strong passion of sharing knowledge with the medical fraternity has motivated her to be a part of Medical Dialogues.
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751