Id |
Subject |
Object |
Predicate |
Lexical cue |
T1 |
0-132 |
Sentence |
denotes |
Drug-induced long QT syndrome in injection drug users receiving methadone: high frequency in hospitalized patients and risk factors. |
T2 |
133-144 |
Sentence |
denotes |
BACKGROUND: |
T3 |
145-210 |
Sentence |
denotes |
Drug-induced long QT syndrome is a serious adverse drug reaction. |
T4 |
211-282 |
Sentence |
denotes |
Methadone prolongs the QT interval in vitro in a dose-dependent manner. |
T5 |
283-476 |
Sentence |
denotes |
In the inpatient setting, the frequency of QT interval prolongation with methadone treatment, its dose dependence, and the importance of cofactors such as drug-drug interactions remain unknown. |
T6 |
477-485 |
Sentence |
denotes |
METHODS: |
T7 |
486-718 |
Sentence |
denotes |
We performed a systematic, retrospective study comparing active or former intravenous drug users receiving methadone and those not receiving methadone among all patients hospitalized over a 5-year period in a tertiary care hospital. |
T8 |
719-886 |
Sentence |
denotes |
A total of 167 patients receiving methadone fulfilled the inclusion criteria and were compared with a control group of 80 injection drug users not receiving methadone. |
T9 |
887-1038 |
Sentence |
denotes |
In addition to methadone dose, 15 demographic, biological, and pharmacological variables were considered as potential risk factors for QT prolongation. |
T10 |
1039-1047 |
Sentence |
denotes |
RESULTS: |
T11 |
1048-1207 |
Sentence |
denotes |
Among 167 methadone maintenance patients, the prevalence of QTc prolongation to 0.50 second((1/2)) or longer was 16.2% compared with 0% in 80 control subjects. |
T12 |
1208-1281 |
Sentence |
denotes |
Six patients (3.6%) in the methadone group presented torsades de pointes. |
T13 |
1282-1412 |
Sentence |
denotes |
QTc length was weakly but significantly associated with methadone daily dose (Spearman rank correlation coefficient, 0.20; P<.01). |
T14 |
1413-1598 |
Sentence |
denotes |
Multivariate regression analysis allowed attribution of 31.8% of QTc variability to methadone dose, cytochrome P-450 3A4 drug-drug interactions, hypokalemia, and altered liver function. |
T15 |
1599-1732 |
Sentence |
denotes |
CONCLUSIONS: QT interval prolongation in methadone maintenance patients hospitalized in a tertiary care center is a frequent finding. |
T16 |
1733-1860 |
Sentence |
denotes |
Methadone dose, presence of cytochrome P-450 3A4 inhibitors, potassium level, and liver function contribute to QT prolongation. |
T17 |
1861-1916 |
Sentence |
denotes |
Long QT syndrome can occur with low doses of methadone. |