Autonomic function in @entity573 with XXXX : usefulness of monitoring heart rate variability.

@entity1 @entity573 @entity944 @entity583 @entity943 @entity574
BACKGROUND: Despite anticoagulant therapy, many @entity1 with @entity573 and @entity574 develop @entity583 . These @entity1 have a high risk of @entity944 , but the etiology is not clear. We studied autonomic function and the possibility of malignant @entity943 through heart rate variability. METHODS: We studied six @entity573 @entity1 with @entity583 and 16 normal controls. Heart rate variability was investigated using a 24 h electrocardiogram. We assessed the standard deviation from the mean of the normal R-R intervals (SDNN), the proportion of adjacent R-R intervals with a difference greater than 50 msec (pNN50) and the root-mean square of successive R-R differences as time-domain analysis (rMSSD). We assessed very low-frequency power, low-frequency power (LF), high-frequency power (HF) and the LF/HF ratio in frequency-domain analysis. RESULTS: There was no significant difference in SDNN, but there was a significant difference in pNN50 and rMSSD. @entity1 with @entity573 showed lower HF and higher LF/HF than normal controls. CONCLUSION: Our findings suggest that @entity1 with @entity573 and @entity583 show decreased vagal activity, which could cause malignant @entity943 .
