title: Angiotensin-converting enzyme and angiotensinogen gene polymorphisms and heart rate variability in twins.
abstract: Decreased heart rate variability (HRV) is associated with congestive heart failure, post-myocardial infarction, ventricular arrhythmias, sudden cardiac death, and advancing age. A deletion/insertion polymorphism in the angiotensin-converting enzyme (ACE) gene and a substitution (M235T) in the angiotensinogen gene have been associated with risk for heart disease. The aim of this study was to determine the heritability of HRV and related parameters in monozygotic and dizygotic twins and to assess the influence of ACE and angiotensinogen polymorphisms. We studied 95 MZ pairs and 46 DZ pairs. We measured HRV and related parameters, ACE and angiotensinogen levels, plasma norepinephrine, ACE, and angiotensinogen genotypes. We found that HRV and related parameters were significantly influenced by genetic variability, although nonshared genetic effects were also important. Angiotensinogen and plasma norepinephrine were generally correlated with decreased HRV, whereas ACE was correlated with perturbances of normal rhythmic HRV. Nevertheless, the DD ACE genotype was associated with increased HRV (p <0.05), whereas angiotensinogen polymorphisms had no effect. We conclude that HRV and related parameters are in part heritable. Interestingly, the DD ACE genotype is associated with increased HRV.
authors.affiliation: Franz Volhard Clinic at the Max Delbück Center for Molecular Medicine, Virchow Klinikum, Humboldt University of Berlin, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Busjahn
authors.forename: A
authors.initials: A
authors.lastname: Voss
authors.forename: H
authors.initials: H
authors.lastname: Knoblauch
authors.forename: M
authors.initials: M
authors.lastname: Knoblauch
authors.forename: E
authors.initials: E
authors.lastname: Jeschke
authors.forename: N
authors.initials: N
authors.lastname: Wessel
authors.forename: J
authors.initials: J
authors.lastname: Bohlender
authors.forename: J
authors.initials: J
authors.lastname: McCarron
authors.forename: H D
authors.initials: HD
authors.lastname: Faulhaber
authors.forename: H
authors.initials: H
authors.lastname: Schuster
authors.forename: R
authors.initials: R
authors.lastname: Dietz
authors.forename: F C
authors.initials: FC
authors.lastname: Luft
mesh_terms: D000328:Adult; D000808:Angiotensinogen / Q000235:genetics*; D005260:Female; D005838:Genotype; D005858:Germany; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D007703:Peptidyl-Dipeptidase A / Q000235:genetics*; D011110:Polymorphism, Genetic; D014427:Twins / Q000235:genetics*; D044465:White People / Q000235:genetics
chemical_list: D000808:Angiotensinogen; D007703:Peptidyl-Dipeptidase A