Abstract
Patients with craniopharyngioma are susceptible to autonomic dysfunction as a
result of hypothalamic damage. We evaluated indices of heart rate
variability (HRV) in patients with childhood-onset craniopharyngioma to
investigate autonomic function and its relationship with components of the
metabolic syndrome (MetS). This cross-sectional, case-only study included 53
patients (10–30 years of age). We measured the standard deviation of
all normal R-R intervals (SDNN) and total power indicating overall HRV, the
root-mean square of the difference of successive R-R intervals (RMSSD) and
high frequency indicating parasympathetic modulation, and low frequency.
These indices were compared according to the presence of the MetS. During
the mean 10.8 years of follow-up, 25% of patients were diagnosed
with the MetS. Patients with the MetS showed significantly lower levels of
SDNN (29.0 vs. 40.6 ms), total power (416.1 vs.
1129.6 ms2), RMSSD (20.1 vs. 34.5 ms), high
frequency (94.7 vs. 338.5 ms2), and low frequency (94.5
vs. 289.4 ms2) than those without (p <0.05, for
all). Individual components of the MetS including insulin resistance, serum
triglycerides levels, and systolic blood pressure were inversely associated
with SDNN, total power, RMSSD and high frequency. Higher overall variability
and parasympathetic modulation were related to decreased odds ratios for
having the MetS (OR 0.91, p=0.029 for SDNN; OR 0.91, p=0.032
for total power). In conclusion, autonomic dysfunction, as evidenced by
reduced HRV indices, is associated with increased cardiometabolic risk in
patients with childhood-onset craniopharyngioma.
Key words
autonomic nervous system dysfunction - heart rate variability - metabolic syndrome
- craniopharyngioma