Cardiac autonomic regulation (CAR) was a significant predictor of prior myocardial infarction, whereas cardiac autonomic balance (CAB) significantly predicted concurrent diabetes.
Observational
The concept of autonomic balance views autonomic states along a bipolar continuum from sympathetic (S) to parasympathetic (P) dominance, whereas regulatory capacity models emphasize overall autonomic flexibility as a marker of the capacity for regulation. These two concepts were evaluated for their utility in characterizing patterns of autonomic control. Measures of P (high frequency heart rate variability, HF) and S (preejection period, PEP) cardiac control were obtained. A measure of cardiac autonomic balance (CAB) was derived as the difference in the normalized P index minus the S index, and a measure of cardiac autonomic regulation (CAR) was derived as the normalized P index plus the S index. Results reveal that CAR, but not CAB, was a significant predictor of the prior occurrence of a myocardial infarction, net of demographic and other variables, whereas CAB, but not CAR, was a significant predictor of concurrent diabetes.
Berntson et al. (Wed,) conducted a observational in Myocardial infarction and diabetes. Cardiac autonomic regulation (CAR) and cardiac autonomic balance (CAB) was evaluated on Prior occurrence of myocardial infarction and concurrent diabetes. Cardiac autonomic regulation (CAR) was a significant predictor of prior myocardial infarction, whereas cardiac autonomic balance (CAB) significantly predicted concurrent diabetes.