Document Detail

Changes in exercise capacity in subjects with cardiac asymptomatic hereditary hemochromatosis during a follow-up after 5 yrs.
MedLine Citation:
PMID:  22311055     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: A long-term effect of hereditary hemochromatosis (HH) on aerobic exercise capacity (AEC) has not been well described.
DESIGN: Forty-three HH and 21 volunteer control subjects who were asymptomatic underwent cardiopulmonary exercise testing using the Bruce protocol. AEC was assessed with minute ventilation (V(E)), oxygen uptake (V(O)(2)), and carbon dioxide production (V(CO)(2)) at baseline and at a follow-up assessment after 5 yrs. A paired t test was used for analyses of normality data; otherwise, Wilcoxon's signed rank-sum test was used.
RESULTS: Thirty-three HH subjects and 18 volunteer control subjects returned for a repeat cardiopulmonary exercise testing at the fifth-year follow-up (80% overall return rate). At the fifth-year follow-up, AEC was not different between the two groups. Compared with baseline measurements, exercise time, peak V(O)(2), and the V(E)/V(CO)(2) slope did not differ statistically at the fifth-year follow-up between both groups. Iron depletion through phlebotomy for 5 yrs did not significantly affect AEC in newly diagnosed HH subjects at baseline (n = 14) and cardiac arrhythmias during exercise tended to decrease after 5 yrs of therapy in this group.
CONCLUSIONS: The AEC of asymptomatic HH subjects treated using conventional therapy is not statistically affected by the disease during a 5-yr period.
Yukitaka Shizukuda; Kevin P Smith; Dorothy J Tripodi; Ross Arena; Yu-Ying Yau; Charles D Bolan; Myron A Waclawiw; Susan F Leitman; Douglas R Rosing
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of physical medicine & rehabilitation / Association of Academic Physiatrists     Volume:  91     ISSN:  1537-7385     ISO Abbreviation:  Am J Phys Med Rehabil     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-04-20     Completed Date:  2012-06-19     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  8803677     Medline TA:  Am J Phys Med Rehabil     Country:  United States    
Other Details:
Languages:  eng     Pagination:  418-24     Citation Subset:  AIM; IM    
Cardiovascular and Pulmonary Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, USA.
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MeSH Terms
Case-Control Studies
Exercise Test
Exercise Tolerance / physiology*
Follow-Up Studies
Heart Rate
Hemochromatosis / genetics*,  physiopathology*,  therapy
Middle Aged
Time Factors
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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