A marked decrease in heart rate variability in Marfan syndrome patients with confirmed FBN1 mutations.
BACKGROUND
The studies on heart rate variability (HRV), a key predictor of all-cause mortality, in Marfan syndrome (MS), up to now have not been reported, especially in patients with FBN1 mutations.


METHODS
Among 18 MS patients with the phenotype of MS meeting inclusion criteria 15 have had a FBN1 gene mutation. Short electrocardiography records were taken in the supine position and during orthostatic tests. The control group consisted of 30 apparently healthy nonathletes matched by age and gender.


RESULTS
Heart rates in MS patients with the FBN1 mutation were increased in both the supine position and orthostatic test (p < 0.001). Most of the time-domain (standard deviation, pNN50) and frequency-domain (total power, very low, low, and high frequency) parameters of HRV were significantly reduced in the MS patients (p < 0.001).


CONCLUSIONS
A marked decrease in HRV, documented in the study, may be an important clinical feature in MS patients with confirmed FBN1 gene mutations.
Department of Medicine, Lviv College of Physical Culture, Lviv, Ukraine. cherkasandriy@yahoo.com.
Andriy
A
Cherkas
Rustam
R
Zhuraev
D000328:Adult; D001919:Bradycardia / Q000175:diagnosis / Q000235:genetics* / Q000503:physiopathology; D016022:Case-Control Studies; D004252:DNA Mutational Analysis; D004244:Dizziness / Q000235:genetics / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D000071838:Fibrillin-1 / Q000235:genetics*; D020022:Genetic Predisposition to Disease; D006339:Heart Rate / Q000235:genetics*; D006801:Humans; D008297:Male; D008382:Marfan Syndrome / Q000175:diagnosis / Q000235:genetics* / Q000503:physiopathology; D009154:Mutation; D056888:Patient Positioning; D010641:Phenotype; D016683:Supine Position; D055815:Young Adult; D054392:Adipokines
D000071838:Fibrillin-1; C000605722:FBN1 protein, human; D054392:Adipokines
FBN1 mutation; Marfan syndrome; autonomic control; heart rate; heart rate variability; metabolism; transforming growth factor beta