[Decreased vagal tone in hyperkinetic heart syndrome?]. 1990

R Schräder, and R Samaan, and A Wellstein, and B Schulte, and D Palm, and M Kaltenbach
Abteilung für Kardiologie, Klinikum der Johann-Wolfgang-Goethe-Universität, Frankfurt am Main.

Increasing amounts of atropine (0.03 mg + 0.07 mg + 0.01 mg + 0.25 mg + 0.5 mg + 1.0 mg + 1.5 mg; sigma = 3.5 mg, interval between injections: 30 min) were injected intravenously in a cumulative manner in five patients with hyperkinetic heart syndrome and in seven healthy volunteers. The heart rate increased from 93 to 127 beats per min in patients, and from 63 to 104 beats per min. in controls. The diastolic blood pressure slightly increased in both groups, whereas the systolic blood pressure did not change significantly. The accommodation diminished from 6 to 2 dioptries in patients, and from 8 to 5 dioptries in controls. Salivary flow fell from 1.6 to 0.1 g/min in patients with hyperkinetic heart syndrome, and from 1.3 to 0.1 g/min in control persons, respectively. The maximum occupancy of muscarinic receptors (m2-glandular), as measured in plasma specimens by means of a radioreceptor assay, reached more than 80% in each group. The dose-response-curves of atropine were highly comparable in patients and controls. It is concluded that the effects of atropine are essentially the same in patients with hyperkinetic heart syndrome and in healthy control persons. There is no evidence for a diminished vagal tone in such patients.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009449 Neurocirculatory Asthenia A clinical syndrome characterized by palpitation, SHORTNESS OF BREATH, labored breathing, subjective complaints of effort and discomfort, all following slight PHYSICAL EXERTION. Other symptoms may be DIZZINESS, tremulousness, SWEATING, and INSOMNIA. Neurocirculatory asthenia is most typically seen as a form of anxiety disorder. Cardiac Neurosis,Effort Syndrome,Hyperkinetic Heart Syndrome,Phobia, Cardiac,Asthenia, Neurocirculatory,Cardiac Neuroses,Cardiac Phobia,Heart Syndrome, Hyperkinetic,Neurocirculatory Asthenias,Neurosis, Cardiac,Syndrome, Effort,Syndrome, Hyperkinetic Heart
D011869 Radioligand Assay Quantitative determination of receptor (binding) proteins in body fluids or tissue using radioactively labeled binding reagents (e.g., antibodies, intracellular receptors, plasma binders). Protein-Binding Radioassay,Radioreceptor Assay,Assay, Radioligand,Assay, Radioreceptor,Assays, Radioligand,Assays, Radioreceptor,Protein Binding Radioassay,Protein-Binding Radioassays,Radioassay, Protein-Binding,Radioassays, Protein-Binding,Radioligand Assays,Radioreceptor Assays
D011976 Receptors, Muscarinic One of the two major classes of cholinergic receptors. Muscarinic receptors were originally defined by their preference for MUSCARINE over NICOTINE. There are several subtypes (usually M1, M2, M3....) that are characterized by their cellular actions, pharmacology, and molecular biology. Muscarinic Acetylcholine Receptors,Muscarinic Receptors,Muscarinic Acetylcholine Receptor,Muscarinic Receptor,Acetylcholine Receptor, Muscarinic,Acetylcholine Receptors, Muscarinic,Receptor, Muscarinic,Receptor, Muscarinic Acetylcholine,Receptors, Muscarinic Acetylcholine
D005260 Female Females
D006339 Heart Rate The number of times the HEART VENTRICLES contract per unit of time, usually per minute. Cardiac Rate,Chronotropism, Cardiac,Heart Rate Control,Heartbeat,Pulse Rate,Cardiac Chronotropy,Cardiac Chronotropism,Cardiac Rates,Chronotropy, Cardiac,Control, Heart Rate,Heart Rates,Heartbeats,Pulse Rates,Rate Control, Heart,Rate, Cardiac,Rate, Heart,Rate, Pulse
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D001143 Arousal Cortical vigilance or readiness of tone, presumed to be in response to sensory stimulation via the reticular activating system. Vigilance, Cortical,Arousals,Cortical Vigilance

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