Time course of oxygen uptake and heart rate during Bruce treadmill test in patients following surgery for tetralogy of Fallot

Exercise performance was examined in 14 patients with a prior history of surgical repair for tetralogy of Fallot. Using a Bruce protocol, we evaluated the time course of oxygen uptake and heart rate in these patients and compared them with a standard curve obtained from 63 sex- and age-matched healt...

Full description

Saved in:
Bibliographic Details
Published in:Heart and vessels 1994-01, Vol.9 (4), p.210-217, Article 210
Main Authors: Tatara, K, Matsuoka, S, Kubo, M, Ushiroguchi, Y, Kuroda, Y
Format: Article
Language:English
Subjects:
Adolescent
Case-Control Studies
Child
Exercise Test
Exercise Tolerance
Female
Heart Rate - physiology
Humans
Male
Oxygen Consumption
Tetralogy of Fallot - surgery
Time Factors
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Exercise performance was examined in 14 patients with a prior history of surgical repair for tetralogy of Fallot. Using a Bruce protocol, we evaluated the time course of oxygen uptake and heart rate in these patients and compared them with a standard curve obtained from 63 sex- and age-matched healthy children. Five of the 14 patients had unusual findings. The heart rate increased rapidly in four of them, while the oxygen uptake increased gradually (95% confidence lower limit). It is hypothesized that a reduction in stroke volume during exercise was responsible for these abnormal findings. The remaining unusual finding was in a patient who was known to have myocardial fibrosis and vacuolization. In this particular case, the time course of oxygen uptake and heart rate were both below the 95% coefficient of variation from the beginning to the end of exercise. In patients who have undergone surgical repair for tetralogy of Fallot, the analysis of oxygen uptake time course and the heart rate may provide valuable information for the long-term follow-up.
ISSN:0910-8327
1615-2573
DOI:10.1007/BF01746066