INTRODUCTION: The aim of this paper is to first monitor the changes in the capture threshold of endovascularly placed leads for left ventricle pacing, second to compare the pacing configurations, and third to verify the effect of Steroid elution for endovascular leads. SAMPLE AND METHOD: The study included 202 consecutive single centre patients implanted with the QuartetTM lead (St. Jude Medical). The capture threshold and related lead parameters were tested during implantation, on the day of the patient's discharge, and 3, 9, and 15 months after implantation. The electrical energy corresponding to the threshold values for inducing ventricular contraction was recorded for subgroups of patients with bipolar and pseudo-unipolar pacing vectors and electrodes equipped with and without a slow-eluting steroids. The best setting for the resynchronization effect was generally chosen. Capture threshold was taken as a selection criterion only if there were multiple options with (expected) similar resynchronization effect. RESULTS AND DISCUSSION: The measurements showed that the ratio of threshold energies of UNI vs. BI was 5× higher (p < 0.001) at implantation. At the end of the follow-up, it dropped to 2.6 (p = 0.012). The steroid effect in BI vectors was caused by a double capture threshold in the NSE group compared to the SE group (p < 0.001), increased by approximately 2.5 times (p < 0.001). The study concludes that after a larger initial increase in the capture threshold, the leads showed a gradual increase in the entire set. As a result, the bipolar threshold energies increase, and the pseudo-unipolar energies decrease. Since bipolar vectors require a significantly lower pacing energy, battery life of the implanted device would improve. When evaluating the steroid elution of bipolar vectors, we observe a significant positive effect of a gradual increase of the threshold energy.
- Publikační typ
- časopisecké články MeSH
AIMS: Antiviral drugs are considered as potentially cardiotoxic, due to prolongation of QT interval which may affect incidence of severe ventricular arrhythmias. The main aim of this retrospective study was to assess the influence of treatment by three antiviral drugs on QT interval and to find patients who are at an increased risk of developing malignant ventricular arrhythmias. METHODS: The study included 23 patients (14 men, 9 women) who were treated with a combination of interferon alpha, ribavirin, and an NS3/4A protease inhibitor. The parameters from the 12 leads electrocardiograms were evaluated before treatment, and then 3 ± 1 and 6 ± 1 months after treatment. RESULTS: Heart rate (HR) 69 ± 12 / min and corrected QT interval (QTc) 412 ± 35 ms were obtained before the treatment and there was not observed a significant prolongation of intervals after 3 months (HR 72 ± 11 / min, QTc 412 ± 33 ms) and after 6 months (HR 64 ± 12 / min, QTc 405 ± 28 ms) respectively. In total QTc interval was prolonged from the baseline in 53% and in 43% of the patients 3 months respectively 6 months after treatment. A QTc prolongation over of 450 ms and new treatment-related repolarization change was noted in 1 (4%) patient. CONCLUSION: The study demonstrates that a combination therapy of 3 antiviral drugs does not significantly prolong the QTc interval and does not cause severe pathological changes on the ECG. Patients undergoing this treatment are not at risk of developing heart disease as an undesirable side effect.
- MeSH
- antivirové látky škodlivé účinky MeSH
- chronická hepatitida C * farmakoterapie MeSH
- elektrokardiografie MeSH
- hepatitida C * farmakoterapie MeSH
- lidé MeSH
- retrospektivní studie MeSH
- srdeční arytmie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
AIMS: Antiviral drugs are considered as potentially cardiotoxic, due to prolongation of QT interval which may affect incidence of severe ventricular arrhythmias. The main aim of this retrospective study was to assess the influence of treatment by three antiviral drugs on QT interval and to find patients who are at an increased risk of developing malignant ventricular arrhythmias. METHODS: The study included 23 patients (14 men, 9 women) who were treated with a combination of interferon alpha, ribavirin, and an NS3/4A protease inhibitor. The parameters from the 12 leads electrocardiograms were evaluated before treatment, and then 3 ± 1 and 6 ± 1 months after treatment. RESULTS: Heart rate (HR) 69 ± 12 / min and corrected QT interval (QTc) 412 ± 35 ms were obtained before the treatment and there was not observed a significant prolongation of intervals after 3 months (HR 72 ± 11 / min, QTc 412 ± 33 ms) and after 6 months (HR 64 ± 12 / min, QTc 405 ± 28 ms) respectively. In total QTc interval was prolonged from the baseline in 53% and in 43% of the patients 3 months respectively 6 months after treatment. A QTc prolongation over of 450 ms and new treatment-related repolarization change was noted in 1 (4%) patient. CONCLUSION: The study demonstrates that a combination therapy of 3 antiviral drugs does not significantly prolong the QTc interval and does not cause severe pathological changes on the ECG. Patients undergoing this treatment are not at risk of developing heart disease as an undesirable side effect.
- MeSH
- antivirové látky škodlivé účinky MeSH
- chronická hepatitida C * farmakoterapie MeSH
- elektrokardiografie MeSH
- hepatitida C * farmakoterapie MeSH
- lidé MeSH
- retrospektivní studie MeSH
- srdeční arytmie MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
Chronická diseminovaná intravaskulární koagulopatie (DIC) představuje život ohrožující stav, při kterém dochází k současné aktivaci koagulačního a fibrinolytického systému, obvykle v důsledku perzistentní slabé nebo chronické intermitentní aktivace koagulačních procesů v organismu. Především v populaci geriatrických pacientů je nutné vždy pomyslet na možnost aneurysmatu nebo chronické disekce aorty jako kauzální příčiny rozvoje chronické DIC. Prezentujeme případ 76leté polymorbidní ženy s implantovaným stentgraftem v hrudní aortě pro disekci typu B, u které byla zjištěna chronická diseminovaná koagulopatie manifestující se závažnou recidivující epistaxí. Příčinou rozvoje DIC bylo objemné aneurysma torakoabdominální aorty s přetrvávající disekcí typu B. Vzhledem k polymorbiditě a křehkosti pacientky nebylo indikováno chirurgické řešení nebo endovaskulární intervence, ale byla zvolena konzervativní terapie a dlouhodobá antikoagulační léčba (rivaroxabanem) vedoucí k úspěšnému zvládnutí stavu.
Chronic disseminated intravascular coagulation (DIC) represents a life-threatening condition, in which activation of coagulation and fibrinolytic system occurs simultaneously, usually as a consequence of persistent weak or chronic intermittent activation of coagulation system. Especially in the population of elderly patients the possibility of aortic aneurysm and chronic aortic dissection as a precipitating factor needs to be considered. We present a case of 76-year-old woman with a history of thoracic endovascular aortic repair for aortic dissection Stanford type B four years earlier with repeated serious epistaxis during months, who was diagnosed with chronic DIC due to persisting aortic dissection and complicating huge thoracoabdominal aneurysm and was unsuitable for surgical or endovascular treatment for the general health condition and frailty status. We initiated a therapy with anticoagulation (rivaroxaban) which has led to successful outcome.
- MeSH
- antikoagulancia farmakologie terapeutické užití MeSH
- aortální aneurysma farmakoterapie MeSH
- diseminovaná intravaskulární koagulace * farmakoterapie MeSH
- lidé MeSH
- rivaroxaban * farmakologie terapeutické užití MeSH
- senioři MeSH
- výsledek terapie MeSH
- Check Tag
- lidé MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- Publikační typ
- abstrakt z konference MeSH
Plicní trombembolie se spolu s hlubokou žilní trombózou souhrnně označují jako žilní trombembolická nemoc. Plicní trombembolie působí na pravou komoru srdeční; na základě změny velikosti tlaku a rychlosti nárůstu tlaku v plicnici se morfologicky i klinicky rozlišují dva základní stavy. Jedním z nich je akutní cor pulmonale, které vzniká při rychlém (vteřinovém) nárůstu tlaku v plicnici, morfologicky s obrazem dilatace pravé komory srdeční, klinicky se projevující náhlou srdeční smrtí nebo těžkou oběhovou nestabilitou. Druhou možností je chronické cor pulmonale, kdy se pravá komora postupně adaptuje na narůstající tlak v plicnici a myokard pravé komory kompenzatorně hypertrofuje. Na kazuistickém pitevním případu demonstrujeme vzácně vídanou myokarditidu pravé komory vzniklou na podkladě plicního trombembolismu u 51leté ženy s morfologickými známkami chronické plicní hypertenze. Tato neinfekční myokarditida je charakterizovaná poškozením myokardu (myomalácií) a převážně histiocytární a neutrofilní infiltrací, minoritně jsou přítomny i T-lymfocyty. Tyto změny jsou odlišné od čistě ischemických a zánětlivých změn vídaných při infarktu myokardu. Diskutovány jsou možné patologické mechanismy vzniku myokarditidy indukované plicním trombembolismem.
Deep venous thrombosis and pulmonary thrombembolism are referred to as venous thrombembolism. Pulmonary thrombembolism affects the right ventricle. Two morphologically and clinically distinct conditions are distinguished according to change of blood pressure and speed of blood pressure increase in the pulmonary artery - acute and chronic cor pulmonale. Acute cor pulmonale develops during rapid increase (within seconds) of blood pressure in the pulmonary artery. Morphologically, the condition leads to dilatation of the right ventricle and clinically to sudden cardiac death or severe circulatory instability. Chronic cor pulmonale represents myocardial hypertrophy of the right ventricle as a response to the gradually increasing pressure in the pulmonary artery. Herein, we demonstrate a rare case report of right ventricular myocarditis in a 51-year-old woman with pulmonary thromboembolism and morphological signs of chronic pulmonary hypertension. This non-infectious myocarditis is histologically characterized by myocardial damage (myocytolysis) and dominant histiocytic and neutrophil infiltration accompanied by scanty T-lymphocytes. These inflammatory changes differ from those associated with myocardial infarction. The possible pathological mechanisms of right ventricular myocarditis induced by pulmonary thrombembolism are discussed.
- MeSH
- chronická nemoc MeSH
- cor pulmonale komplikace MeSH
- dysfunkce pravé srdeční komory MeSH
- lidé středního věku MeSH
- lidé MeSH
- myokarditida * komplikace MeSH
- plicní embolie komplikace MeSH
- srdeční komory patologie MeSH
- výsledek terapie MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- kazuistiky MeSH
- Publikační typ
- abstrakt z konference MeSH
- Publikační typ
- abstrakt z konference MeSH
- Publikační typ
- abstrakt z konference MeSH
- Publikační typ
- komentáře MeSH
- novinové články MeSH
