A Comparative Assessment of Cardiovascular Autonomic Reflex Testing and Cardiac ¹²³I-Metaiodobenzylguanidine Imaging in Patients with Type 1 Diabetes Mellitus without Complications or Cardiovascular Risk Factors

Table 2

Cardiac sympathetic innervation imaging with ¹²³I-metaiodobenzylguanidine results as a function of the number of abnormal cardiovascular autonomic reflex tests (CARTs).

	Number of abnormal CARTs
	0	1	2	3	4
Patients with; H/M_4 < 1.80	14/20; (70%)	10/16; (63%)	5/5; (100%)	6/6; (100%)	2/2; (100%)	0.198
H/M_4	1.68 ± 0.17	1.68 ± 0.26	1.51 ± 0.21	1.50 ± 0.08	1.64 ± 0.20	0.170

H/M_4: ratio of the heart to upper mediastinum count density at 4 hours postinjection.