Excessive ventilation after acute myocardial infarction and its improvement in 4 months

Citation
T. Satoh et al., Excessive ventilation after acute myocardial infarction and its improvement in 4 months, JPN CIRC J, 65(5), 2001, pp. 399-403
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Cardiovascular & Respiratory Systems","Cardiovascular & Hematology Research
Journal title
JAPANESE CIRCULATION JOURNAL-ENGLISH EDITION
ISSN journal
0047-1828 → ACNP
Volume
65
Issue
5
Year of publication
2001
Pages
399 - 403
Database
ISI
SICI code
0047-1828(200105)65:5<399:EVAAMI>2.0.ZU;2-1
Abstract
The relationship between ventilation (VE) and CO2 output (VCO2) is fitted l inearly. The steeper gradient implies excessive ventilation. Through an eva luation of the VE-VCO2 slopes, this study investigated whether patients wit h acute myocardial infarction (AMI) have excessive ventilation and whether it improved in 4 months. The VE-VCO2 slopes were determined in exercise tes ts at 1 and 4 months in 131 patients with AMI. Patients were divided into 3 groups according to the 1 month VE-VCO2 slope value: (i) normal(< 30); (ii ) intermediate (30-32); and (iii) excessive (> 32). In the normal group (n= 76), at 4 months, the slope decreased in IO, increased in 5 and remained un changed in 61 patients; in the intermediate (n=31) group, 9, 2 and 20; and in the excessive (n=24) group, 15, 3 and 6, respectively, showing that the slope reduction was greater in the excessive group (p <0.01). The slope cor related with age and acute phase heart failure. The percent reduction of th e slope did not correlate with these parameters, In conclusion, a substanti al fraction of patients with AMI have excessive ventilation that improves i n 4 months. The improvement is greater in patients with greater excessive v entilation but is not associated with an improvement in exercise capacity n or hemodynamics.