qtc interval
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2022 ◽  
Vol 23 (1) ◽  
Author(s):  
Krumpholz Laura ◽  
Wiśniowska Barbara ◽  
Polak Sebastian

AbstractSince an introduction of an ICH guidance in 2005, no new drugs were withdrawn from the market because of the causation of Torsade de Pointes (TdP). However, the risk of TdP is still a concern for marketed drugs. TdP is a type of polymorphic ventricular tachycardia which may lead to sudden cardiac death. QT/QTc interval prolongation is considered a sensitive, but not specific biomarker. To improve the effectiveness of studies’ workflow related to TdP risk prediction we created an extensive, structured, open-access database of drug-related TdP cases. PubMed, Google Scholar bibliographic databases, and the Internet, via the Google search engine, were searched to identify eligible reports. A total of 424 papers with a description of 634 case reports and observational studies were included. Each paper was manually examined and listed with up to 53 variables related to patient/population characteristics, general health parameters, used drugs, laboratory measurements, ECG results, clinical management, and its outcomes, as well as suspected drug’s properties and its FDA adverse reaction reports. The presented database may be considered as an extension of the recently developed and published database of drug cardiac safety-related information, part of the tox-portal project providing resources for cardiac toxicity assessment.


2022 ◽  
Vol 2022 ◽  
pp. 1-9
Author(s):  
JaeHo Yu ◽  
Jeong-Hun Lim ◽  
Sang-Woo Seo ◽  
DongYeop Lee ◽  
JiHeon Hong ◽  
...  

Caffeine is considered a widely consumed natural and legal psychoactive stimulant with several effects on the body. The present study attempted to investigate the effects of caffeine consumed before and after a physical exercise on cardiovascular and cardiorespiratory functions in healthy adults. 36 healthy adult males were recruited and randomly allocated to one of the three (3) groups: group I (exercise without caffeine consumption), group II (caffeine beverage intake before exercise), and group III (caffeine beverage intake immediately after exercise). The heart rate (HR), QTc interval, blood pressure (BP), respiratory rate (RR), oxygen consumption (VO₂), and carbon dioxide emission (VCO₂) were measured at 0, 5, 10, and 15 min after the exercise. We observed a significant difference in all measured outcomes during the different recovery times in all the groups ( p < 0.05 ). HR, RR, SBP, VO2, and VCO2 gradually decreased with time, DBP contrarily increased with time, and the QTc showed an irregular pattern. We can affirm that ingestion of caffeine before and after moderate aerobic exercise slows down the parasympathetic stimulation, heart rate recovery, and the recovery of HR and QTc with no major effects on BP, RR, VO₂, and VCO₂ in healthy adult men.


2022 ◽  
Vol 67 (4) ◽  
pp. 232-238
Author(s):  
Zhang You-gui ◽  
Sun Jie ◽  
Han Ruo-Dong ◽  
Wang Yan-Hong ◽  
Li Gen ◽  
...  

Acute organophosphate poisoning kills tens of thousands of people annually around the world. These substances are widely used as insecticides in homes, industry, and agricultural environments. Due to the ease of access, they can cause accidental or intentional risks of exposure through the skin or respiratory contact. This study aimed to evaluate the serum levels of hs-CRP, Vitronectin, and NT-proBNP and their relationship with the extent and severity of cardiac complications in patients with organophosphate pesticide poisoning. In this descriptive-comparative study, 160 patients were studied with acute organophosphate poisoning. Also, for better comparison, 40 healthy individuals participated in this study. Diagnosis of organophosphate poisoning was based on clinical findings of serum butyrylcholinesterase levels. The hs-CRP measurement was performed by an autoanalyzer (Abbott, model Alcyon 300, USA) with the ELISA hs-CRP kit (The apDia Company, Belgium). Vitronectin (VN) measurements were performed by ELISA method and Glory science human VN kit with Catalog No: 11668. NT-ProBNP serum levels were analyzed by ProBNP assay kit (Roche, Germany) by ECLIA method using Elecsys 2010 Analyzer. The most important variables studied in this study were the electrical activity and conduction system of the heart, PR distance, QTC interval, and T-wave changes. In this study, most of the patients were women and girls (60.78%). The highest percentage of organophosphate poisoning was in the age group of 15-24 years (37.25%). In most cases (78.43%), poisoning was intentional or suicidal. Evaluation of electrophysiological abnormalities of the heart showed that 89 patients (55.62%) had long QTC interval (>450 msec), 43 cases (26.87%) had possible long QTC (431-450 msec), and 28 cases (17.5%) had normal QTC (<430 msec). Only 9.37% of cases (n = 15) showed an increase in P-R distance, which is characteristic of the first-degree ventricular atrial block. Sinus bradycardia occurred in 57 cases (35.62%) and sinus tachycardia in 43 cases (26.87%); in 60 cases (37.5%), the pulse rate was normal. Smooth T-wave changes were observed in 9.8% of patients and reverse T-wave was observed in 17.6%. A long T-wave was not reported in any case. In only two cases (1.25%) was grade 1 ventricular atrial block and grade 2 and 3 blocks were not observed. In general, there was a significant difference in the hs-CRP, vitronectin, and NT-proBNP serum levels between the patient and control groups in all studied variables. These parameters were also related to the extent and severity of the disease.


2022 ◽  
Vol 13 (01) ◽  
pp. 019-029
Author(s):  
Steven Stettner ◽  
Sarah Adie ◽  
Sarah Hanigan ◽  
Michael Thomas ◽  
Kristen Pogue ◽  
...  

Abstract Objective The aim of the study is to implement a customized QTc interval clinical decision support (CDS) alert strategy in our electronic health record for hospitalized patients and aimed at providers with the following objectives: minimize QTc prolongation, minimize exposure to QTc prolonging medications, and decrease overall QTc-related alerts. A strategy that was based on the validated QTc risk scoring tool and replacing medication knowledge vendor alerts with custom QTc prolongation alerts was implemented. Methods This is a retrospective quasi-experimental study with a pre-intervention period (August 2019 to October 2019) and post-intervention period (December 2019 to February 2020). The custom alert was implemented in November 2019. Results In the pre-implementation group, 361 (19.3%) patients developed QTc prolongation, and in the post-implementation group, 357 (19.6%) patients developed QTc prolongation (OR: 1.02, 95% CI: 0.87–1.20, p = 0.81). The odds ratio of an action taken post-implementation compared with pre-implementation was 18.90 (95% CI: 14.03–25.47, p <0. 001). There was also a decrease in total orders for QTc prolonging medications from 7,921 (5.5%) to 7,566 (5.3%) with an odds ratio of 0.96 (95% CI: 0.93–0.99, p = 0.01). Conclusion We were able to decrease patient exposure to QTc prolonging medications while not increasing the rate of QTc prolongation as well as improving alert action rate. Additionally, there was a decrease in QTc prolonging medication orders which illustrates the benefit of using a validated risk score with a customized CDS approach compared with a traditional vendor-based strategy. Further research is needed to confirm if an approach implemented at our organization can reduce QTc prolongation rates.


2022 ◽  
Vol 31 (1) ◽  
pp. 83-84
Author(s):  
Sukardi Suba ◽  
Dillon J. Dzikowicz ◽  
Teri M. Kozik ◽  
Michele M. Pelter
Keyword(s):  

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Guerra Francys E ◽  
Carrera Bárbara ◽  
Schenone Gabriel ◽  
Millán Milángela ◽  
Díaz Gabriela ◽  
...  

2021 ◽  
Vol 12 ◽  
Author(s):  
Sung-Ho Ahn ◽  
Ji-Sung Lee ◽  
Young-Hak Kim ◽  
Mi-Sook Yun ◽  
Jung-Hee Han ◽  
...  

Background and Purpose: The aim of this study was to determine the relationship between the heart rate-corrected QT (QTc) interval and the risk of incident long-term mortality in patients with acute ischemic stroke (AIS), considering the impact of sex differences on clinical characteristics, outcomes, and QTc intervals.Methods: We analyzed prospectively registered data included patients with AIS who visited the emergency room within 24 h of stroke onset and underwent routine cardiac testing, such as measurements of cardiac enzymes and 12-lead ECG. QTc interval was corrected for heart rate using Fridericia's formula and was stratified by sex-specific quartiles. Cox proportional hazards models were used to examine the association between baseline QTc interval and incident all-cause death.Results: A total of 1,668 patients with 1,018 (61.0%) men and mean age 66.0 ± 12.4 years were deemed eligible. Based on the categorized quartiles of the QTc interval, cardiovascular risk profile, and stroke severity increased with prolonged QTc interval, and the risk of long-term mortality increased over a median follow-up of 33 months. Cox proportional hazard model analysis showed that the highest quartile of QTc interval (≥479 msec in men and ≥498 msec in women; hazard ratio [HR]: 1.49, 95% confidence interval [CI]: 1.07–2.08) was associated with all-cause death. Furthermore, dichotomized QTc interval prolongation, defined by the highest septile of the QTc interval (≥501 ms in men and ≥517 m in women: HR: 1.33, 95% CI: 1.00–1.80) was significantly associated with all-cause mortality after adjusting for all clinically relevant variables, such as stroke severity.Conclusions: Prolonged QTc interval was associated with increased risk of long-term mortality, in parallel with the increasing trend of prevalence of cardiovascular risk profiles and stroke severity, across sex differences in AIS patients.


2021 ◽  
Vol 8 ◽  
Author(s):  
Anne-Mar Van Ommen ◽  
Elise Laura Kessler ◽  
Gideon Valstar ◽  
N. Charlotte Onland-Moret ◽  
Maarten Jan Cramer ◽  
...  

Background: Electrocardiographic features are well-known for heart failure with reduced ejection fraction (HFrEF), but not for left ventricular diastolic dysfunction (LVDD) and heart failure with preserved ejection fraction (HFpEF). As ECG features could help to identify high-risk individuals in primary care, we systematically reviewed the literature for ECG features diagnosing women and men suspected of LVDD and HFpEF.Methods and Results: Among the 7,127 records identified, only 10 studies reported diagnostic measures, of which 9 studied LVDD. For LVDD, the most promising features were T-end-P/(PQ*age), which is the electrocardiographic equivalent of the passive-to-active filling (AUC: 0.91–0.96), and repolarization times (QTc interval ≥ 350 ms, AUC: 0.85). For HFpEF, the Cornell product ≥ 1,800 mm*ms showed poor sensitivity of 40% (AUC: 0.62). No studies presented results stratified by sex.Conclusion: Electrocardiographic features are not widely evaluated in diagnostic studies for LVDD and HFpEF. Only for LVDD, two ECG features related to the diastolic interval, and repolarization measures showed diagnostic potential. To improve diagnosis and care for women and men suspected of heart failure, reporting of sex-specific data on ECG features is encouraged.


Author(s):  
Marvi Zaka ◽  
Bushra Ghaffar ◽  
Muhammad Fahad

Objective: To look for QTc changes associated with tyrosine kinase inhibitors and factors related to these changes among patients suffering from cancer. Study Design: This correlational study was conducted in Avicenna Medical College and Hospital Lahore with the collaboration of SKMH during November 2020 to May 2021.  Methodology: One hundred and eighty patients with solid or hematological malignancies taking tyrosine kinase inhibitors for more than three months were included in the study. They underwent 12 lead ECG inside oncology department. QTc interval was calculated on ECG of all the patients and they were evaluated for presence of prolonged QT interval. Age, gender, duration of tyrosine kinase inhibitor use and presence of comorbid illness were correlated with presence of QTc changes in our study participants. Results: Out of 180 cancer patients using tyrosine kinase inhibitors for more than three months included in the study, 96 (53.3%) were male while 84 (46.7%) were female. One hundred and eighteen (65.5%) had normal QTc interval while 62 (34.5%) had prolonged QTc interval in our study participants. Binary logistic regression analysis revealed that advanced age of the patient and prolong use of tyrosine kinase inhibitors was statistically significantly associated with QTc prolongation in our study (p-value<0.001). Conclusion: Significant number of cancer patients using tyrosine kinase inhibitors had prolonged QTc interval in our study. Special attention should be paid to the cancer patients with advancing age and prolonged use of tyrosine kinase inhibitors.


Vestnik ◽  
2021 ◽  
pp. 313-318
Author(s):  
Л.Б. Куанова ◽  
Г.М. Жуламанова

Введение. В силу существенной схожести симптомов острого респираторного синдрома SARS-CoV-2 и панического расстройства (ПР), диагностика представляет значительные трудности. ПР имеют тенденцию развиваться хронически, с рецидивами на протяжении всей жизни. Цель работы: выявить особенности клинического проявления ПА/ПР на фоне COVID-19 и обосновать оптимальную схему терапии. Методы. Проведен анализ данных 86 пациентов, у которых диагностировано ПР при обращении на консультативный неврологический прием КФ UMC с мая 2020 г по май 2021 г. Скрининг панического расстройства проведен по Шкале тревоги Шихана (Sheehan Anxiety Rating Scale, ShARS). Результаты. Среди пациентов было 54 (62,8%) женщины и 32(37,2%) мужчины. По шкале ShARS тяжелым тревожное расстройство (80 баллов и выше) определено у 39 (45,3%), у остальных тревога (от 30 до 80 баллов) - клинически выраженная. Диагноз ПР у 21(24,4%) был диагностирован ранее заражения ковидной инфекцией. У остальных, выставлен впервые 26 (30,2%) пациентам, ранее не обращавшихся к неврологу и 39 (45,3%) пациентам, обращавшихся к неврологу с диагнозами соматоформная вегетативная дисфункция, сосудистая цефалгия, мигрень, обсессивно-компульсивное расстройство. Бронхиальная астма отмечалась в анамнезе в 13 (15,1%) случаях. Разновидности панических приступов были расценены как большие (развернутые) ПР (4 симптома и более) - у 55 (64%), в остальных случаях как симптоматически бедные. Особенность течения ПР на фоне SARS-CoV-2 определяется возникновением на фоне ипохондрических фобий. В то же время агорафобии и избегающего поведения, характерных для ПР, не отмечалось. Заключение. Использование бензодиазепинов для анксиолитических целей, противоастматических препаратов может быть контрпродуктивным в лечении тревожных расстройств. Ятрогенный риск наслаивается на возможную гипокалиемию, удлинение интервала QTc, артериальную гипертензию, вызванную COVID-19. Оценка результатов проведённого нейрофармакологического анализа и назначения препаратов анксиолитического действия Бифрен, в более тяжелых случаях ПР Прегабина показала клинический положительный эффект. Introduction. Due to the significant similarity between the symptoms of SARS-CoV-2 acute respiratory syndrome and panic disorder (PD), diagnosis presents significant difficulties. PD tend to develop chronically, with lifelong relapses. Purpose of the work: to identify the features of the clinical manifestation of PD in the presence of COVID-19 and to substantiate the optimal therapy regimen. Methods. We analyzed the data of 86 patients who were diagnosed with PD when they applied for a consultative neurological appointment CF UMC from May 2020 to May 2021. Panic disorder was screened according to the Sheehan Anxiety Rating Scale (ShARS). Results. Among the patients there were 54 (62.8%) women and 32 (37.2%) men. On the ShARS scale, severe anxiety disorder (80 points and higher) was identified in 39 (45.3%), in the rest anxiety (from 30 to 80 points) was clinically expressed. The diagnosis of PD in 21 (24.4%) was diagnosed earlier than contracting a covid infection. The rest were exposed for the first time to 26 (30.2%) patients who had not previously visited a neurologist and 39 (45.3%) patients who visited a neurologist with diagnoses of somatoform autonomic dysfunction, vascular cephalgia, migraine, obsessive-compulsive disorder. A history of bronchial asthma was observed in 13 (15.1%) cases. The types of panic attacks were regarded as large (extensive) PR (4 symptoms or more) - in 55 (64%), in other cases as symptomatically poor. The peculiarity of the course of PR against the background of SARS-CoV-2 is determined by the occurrence of hypochondriac phobias against the background. At the same time, agoraphobia and avoidant behavior characteristic of PD were not observed. Conclusion. The use of benzodiazepines for anxiolytic purposes, anti-asthma drugs may be counterproductive in the treatment of anxiety disorders. The iatrogenic risk is superimposed on possible hypokalemia, prolongation of the QTc interval, arterial hypertension caused by COVID-19. Evaluation of the results of the neuropharmacological analysis and the appointment of drugs with anxiolytic action Bifren, in more severe cases of Pregabin in PR showed a clinical positive effect.


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