Research Article
Diabetic Retinopathy Is Strongly Predictive of Cardiovascular Autonomic Neuropathy in Type 2 Diabetes
Table 1
Modified Composite Autonomic Scoring Scale (subscores in cardiovagal and adrenergic domains).
| Cardiovagal |
| 0 | Normal | 1 | HR_DB mildly reduced but >50% of minimum | 2 | HR_DB reduced to <50% of minimum or HR_DB + VR reduced | 3 | Both HR_DB and VR reduced to <50% of minimum |
| Adrenergic |
| 0 | Normal | 1 | Early phase II reduction >20 but <40 mmHg MBP (30–40 if >50 years) | Late phase II does not return to baseline | Pulse pressure reduction to ≤50% of baseline | 2 | Early phase II reduction >40 mmHg MBP | 3 | Early phase II reduction >40 mmHg + absent late phase II and phase IV |
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HR_DB: heart rate response to deep breathing; VR: Valsalva ratio; MBP: mean blood pressure.
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