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2019 ; 14
(ä): 1053-1061
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gab.com Text
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English Wikipedia
Long QT and death in hospitalized patients with acute exacerbation of chronic
obstructive pulmonary disease is not related to electrolyte disorders
#MMPMID31190790
Zilberman-Itskovich S
; Rahamim E
; Tsiporin-Havatinsky F
; Ziv-Baran T
; Golik A
; Zaidenstein R
Int J Chron Obstruct Pulmon Dis
2019[]; 14
(ä): 1053-1061
PMID31190790
show ga
Objectives: COPD is the fourth-leading cause of mortality worldwide. Prolonged
QTc has been found to be a long-term negative prognostic factor in ambulatory
COPD patients. The aim of this study was to evaluate the extent of prolonged-QTc
syndrome in COPD patients upon admission to an internal medicine department, its
relationship to hypomagnesemia, hypokalemia, and hypocalcemia, and the effect of
COPD treatment on mortality during hospital stay. Methods: This prospective
cohort study evaluated COPD patients hospitalized in an internal medicine
department. The study evaluated QTc, electrolyte levels, and known risk factors
during hospitalization of COPD patients. Results: A total of 67 patients were
recruited. The median QTc interval was 0.441 seconds and 0.434 seconds on days 0
and 3, respectively. Prolonged QTc was noted in 35.8% of patients on admission
and 37.3% on day 3 of hospitalization. The median QTc in the prolonged-QTc group
on admission was 0.471 seconds and in the normal-QTc group 0.430 seconds. There
was no significant difference in age, sex, electrolyte levels, renal function
tests, or blood gases on admission between the two groups. Mortality during the
hospital stay was significantly higher in the prolonged-QTc group (3 deaths, 12%)
than in the normal QTc group (no deaths) (P=0.04). A subanalysis was performed,
removing known causes for prolonged QTc. We found no differences in age,
electrolytes, or renal functions. There was a small but significant difference in
bicarbonate levels. Conclusion: Our findings demonstrated that there was no
correlation between QTc prolongation in hospitalized COPD patients and
electrolyte levels, comorbidities, or relevant medications. A higher rate of
mortality was noted in patients with prolonged QTc in comparison to normal QTc.
As such, it is suggested that prolonged QTc could serve as a negative prognostic
factor for mortality during hospitalization in COPD patients.