• MeSH
• blokáda Tawarova raménka etiologie   terapie   MeSH
• elektrokardiografie MeSH
• funkce levé komory srdeční MeSH
• Hisův svazek * MeSH
• kardiomyopatie * etiologie   terapie   MeSH
• kardiostimulace umělá škodlivé účinky   MeSH
• lidé MeSH
• srdeční komory MeSH
• výsledek terapie MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND AND AIMS: Right bundle branch block (RBBB) and resulting right ventricular (RV) electromechanical discoordination are thought to play a role in the disease process of subpulmonary RV dysfunction that frequently occur post-repair tetralogy of Fallot (ToF). We sought to describe this disease entity, the role of pulmonary re-valvulation, and the potential added value of RV cardiac resynchronization therapy (RV-CRT). METHODS: Two patients with repaired ToF, complete RBBB, pulmonary regurgitation, and significantly decreased RV function underwent echocardiography, cardiac magnetic resonance, and an invasive study to evaluate the potential for RV-CRT as part of the management strategy. The data were used to personalize the CircAdapt model of the human heart and circulation. Resulting Digital Twins were analysed to quantify the relative effects of RV pressure and volume overload and to predict the effect of RV-CRT. RESULTS: Echocardiography showed components of a classic RV dyssynchrony pattern which could be reversed by RV-CRT during invasive study and resulted in acute improvement in RV systolic function. The Digital Twins confirmed a contribution of electromechanical RV dyssynchrony to RV dysfunction and suggested improvement of RV contraction efficiency after RV-CRT. The one patient who underwent successful permanent RV-CRT as part of the pulmonary re-valvulation procedure carried improvements that were in line with the predictions based on his Digital Twin. CONCLUSION: An integrative diagnostic approach to RV dysfunction, including the construction of Digital Twins may help to identify candidates for RV-CRT as part of the lifetime management of ToF and similar congenital heart lesions.

• MeSH
• blokáda Tawarova raménka diagnostické zobrazování   etiologie   terapie   MeSH
• dysfunkce pravé srdeční komory * diagnostické zobrazování   etiologie   terapie   MeSH
• echokardiografie MeSH
• Fallotova tetralogie * diagnostické zobrazování   chirurgie   MeSH
• lidé MeSH
• počítačová simulace MeSH
• srdeční komory MeSH
• srdeční resynchronizační terapie * škodlivé účinky   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Cardiac resynchronization therapy (CRT) using biventricular pacing (BVP) is effective in patients with heart failure, left bundle branch block (LBBB), and reduced left ventricular function. Left bundle branch area pacing (LBBAP) has been reported as an alternative option for CRT. OBJECTIVE: The purpose of this study was to assess the feasibility and outcomes of LBBAP in patients who failed conventional BVP because of coronary venous (CV) lead complications or who were nonresponders to BVP. METHODS: At 16 international centers, LBBAP was attempted in patients with conventional CRT indication who failed BVP because of CV lead complications or lack of therapeutic response to BVP. Heart failure hospitalization (HFH) and death, echocardiographic outcomes, procedural data, pacing parameters, and lead complications including CV lead failure are reported. RESULTS: LBBAP was successfully performed in 200 patients (CV lead failures 156; nonresponders 44) (age 68 ± 11 years; female 35%; LBBB 55%; right ventricular pacing 23%; ischemic cardiomyopathy 28%; nonischemic cardiomyopathy 63%; left ventricular ejection fraction [LVEF] ≤35% in 80%). Procedural duration was 119.5 ± 59.6 minutes, and fluoroscopy duration was 25.7 ± 18.5 minutes. LBBAP threshold and R-wave amplitudes were 0.68 ± 0.35 V @ 0.45 ms and 10.4 ± 5 mV at implant, respectively, and remained stable during mean follow-up of 12 ± 10.1 months. LBBAP resulted in significant QRS narrowing from 170 ± 28 ms to 139 ± 25 ms (P <.001) with V6 R-wave peak times of 85 ± 17 ms. LVEF improved from 29% ± 10% at baseline to 40% ± 12% (P <.001) during follow-up. The risk of death or HFH was lower in those with CV lead failure than in nonresponders (hazard ratio 0.357; 95% confidence interval 0.168-0.756; P = .007) CONCLUSION: LBBAP is a viable alternative to CRT in patients who failed conventional BVP due to CV lead failure or who were nonresponders.

• MeSH
• blokáda Tawarova raménka diagnóza   etiologie   terapie   MeSH
• elektrokardiografie metody   MeSH
• funkce levé komory srdeční fyziologie   MeSH
• Hisův svazek MeSH
• kardiostimulace umělá metody   MeSH
• lidé středního věku MeSH
• lidé MeSH
• senioři MeSH
• srdeční arytmie terapie   MeSH
• srdeční resynchronizační terapie * metody   MeSH
• srdeční selhání * diagnóza   etiologie   terapie   MeSH
• tepový objem MeSH
• výsledek terapie MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

AIMS: Permanent transseptal left bundle branch area pacing (LBBAP) is a promising new pacing method for both bradyarrhythmia and heart failure indications. However, data regarding safety, feasibility and capture type are limited to relatively small, usually single centre studies. In this large multicentre international collaboration, outcomes of LBBAP were evaluated. METHODS AND RESULTS: This is a registry-based observational study that included patients in whom LBBAP device implantation was attempted at 14 European centres, for any indication. The study comprised 2533 patients (mean age 73.9 years, female 57.6%, heart failure 27.5%). LBBAP lead implantation success rate for bradyarrhythmia and heart failure indications was 92.4% and 82.2%, respectively. The learning curve was steepest for the initial 110 cases and plateaued after 250 cases. Independent predictors of LBBAP lead implantation failure were heart failure, broad baseline QRS and left ventricular end-diastolic diameter. The predominant LBBAP capture type was left bundle fascicular capture (69.5%), followed by left ventricular septal capture (21.5%) and proximal left bundle branch capture (9%). Capture threshold (0.77 V) and sensing (10.6 mV) were stable during mean follow-up of 6.4 months. The complication rate was 11.7%. Complications specific to the ventricular transseptal route of the pacing lead occurred in 209 patients (8.3%). CONCLUSIONS: LBBAP is feasible as a primary pacing technique for both bradyarrhythmia and heart failure indications. Success rate in heart failure patients and safety need to be improved. For wider use of LBBAP, randomized trials are necessary to assess clinical outcomes.

• MeSH
• blokáda Tawarova raménka terapie   etiologie   MeSH
• bradykardie terapie   etiologie   MeSH
• elektrokardiografie metody   MeSH
• Hisův svazek * MeSH
• kardiostimulace umělá škodlivé účinky   metody   MeSH
• lidé MeSH
• senioři MeSH
• srdeční selhání * MeSH
• výsledek terapie MeSH
• Check Tag
• lidé MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH
• pozorovací studie MeSH

His bundle pacing is a relatively new method of cardiac pacing. This method is used in patients with atrioventricular block to prevent heart failure associated with right ventricular pacing, and in patients with bundle branch block and cardiomyopathy. We report a patient with cardiomyopathy and left bundle branch block with failure of cardiac resynchronization therapy. Permanent His bundle pacing was associated with clinical improvement and improvement of parameters of cardiac function.

• MeSH
• blokáda Tawarova raménka diagnóza   etiologie   patofyziologie   chirurgie   MeSH
• dilatační kardiomyopatie komplikace   diagnóza   patofyziologie   chirurgie   MeSH
• elektrokardiografie MeSH
• funkce levé komory srdeční fyziologie   MeSH
• Hisův svazek fyziologie   MeSH
• implantované elektrody MeSH
• kardiostimulace umělá metody   MeSH
• kardiostimulátor MeSH
• lidé MeSH
• senioři MeSH
• srdeční katetrizace přístrojové vybavení   metody   MeSH
• srdeční resynchronizační terapie škodlivé účinky   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• kazuistiky MeSH

AIMS: We analysed the impact of bundle branch block (BBB) and pacemaker (PM) implantation on symptoms and survival after alcohol septal ablation (ASA) in patients with hypertrophic cardiomyopathy (HCM). METHODS AND RESULTS: Among 1416 HCM patients from the Euro-ASA registry, 58 (4%) patients had a PM and 64 (5%) patients had an implantable cardioverter-defibrillator (ICD) before ASA. At latest follow-up (5.0 ± 4.0 years) after ASA, 118 (8%) patients had an ICD and 229 (16%) patients had a PM. In patients without an implantable device prior to ASA 13% had a PM and 5% had an ICD implanted following ASA. New onset BBB was present in 44% (right BBB in 31%) of patients without previous BBB. At latest follow-up, we found no associations between BBB and New York Heart Association (NYHA) Class 3-4 [odds ratio (OR) 0.98, 95% confidence interval (CI) 0.63-1.51; P = 0.91] or Canadian Cardiovascular Society (CCS) Class 3-4 (OR 1.5, CI 0.32-6.7; P = 0.62), respectively, and no associations between PM and NYHA Class 3-4 (OR 1.2, CI 0.70-2.0; P = 0.52) or CCS 3-4 (OR 1.3, CI 0.24-6.6; P = 0.79), respectively. The survival after ASA was not reduced in patients with BBB [hazard ratio (HR) 0.73, CI 0.53-1.01; P = 0.06] or PM (HR 0.78, CI 0.52-1.17; P = 0.24). CONCLUSIONS: Development of BBB or need for a PM after ASA in patients with obstructive HCM was not associated with inferior symptomatic outcome or reduced survival, thus concerns for the negative impact of impaired cardiac conduction on the clinical outcome after ASA were not confirmed.

• MeSH
• blokáda Tawarova raménka etiologie   terapie   MeSH
• defibrilátory implantabilní * MeSH
• dospělí MeSH
• ethanol aplikace a dávkování   škodlivé účinky   MeSH
• hypertrofická kardiomyopatie terapie   MeSH
• kardiostimulátor * MeSH
• lidé středního věku MeSH
• lidé MeSH
• míra přežití MeSH
• registrace MeSH
• senioři MeSH
• výsledek terapie MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

Syndrom ALCAPA (anomální odstup levé věnčité tepny z plicní arterie) je extrémně vzácná vrozená srdeční vada spojená s vysokou mortalitou v dětském věku. Výjimečně se postižení jedinci dožívají vyššího věku, aniž by byla stanovena a řešena diagnóza ALCAPA. V kasuistice popisujeme případ asymptomatického 45letého muže, u nějž byla diagnóza stanovena v rámci došetření blokády levého Tawarova raménka a mírně snížené systolické funkce levé komory. Ačkoliv klíčovou diagnostickou metodou ALCAPA je koronarografie a výpočetní tomografie, v našem případě byla přesná diagnóza stanovena echokardiograficky. Původně byl pacient veden u ambulantního kardiologa s nesprávnou diagnózou mnohočetného defektu komorového septa. Ve skutečnosti se však jednalo i dezinterpretaci ultrazvukového obrazu interkoronárních spojek. Současná přítomnost samostatného odstupu ramus diagonalis z aorty činí kasuistiku ještě zajímavější.

ALCAPA syndrome (anomalous origin of left coronary artery from the pulmonary artery) is an extremely rare congenital cardiac anomaly associated with high mortality rate at young age. If undiagnosed and uncorrected, the affected individuals rarely survive beyond infancy. This article reports on a 45-year-old asymptomatic man with the ALCAPA diagnosed thanks to a detailed cardiac examination that followed the finding of the left bundle branch block and a decreased left ventricular systolic ejection fraction. Although coronary angiography and computed tomography are considered to be the key diagnostic methods for ALCAPA, in this case the diagnosis was established based on echocardiography. Previously, the patient has been under regular review by a cardiologist with the incorrect diagnosis of multiple ventricular septal defects. In fact, this diagnosis resulted from a misinterpretation of the ultrasound image of the intercoronary connections. The presence of a separate diagonal artery originating from aorta renders this case report even more interesting.

• MeSH
• anomálie koronárních cév * chirurgie   diagnóza   terapie   MeSH
• blokáda Tawarova raménka etiologie   komplikace   MeSH
• echokardiografie metody   MeSH
• koronární cévy anatomie a histologie   chirurgie   embryologie   MeSH
• lidé středního věku MeSH
• lidé MeSH
• mitrální insuficience etiologie   komplikace   MeSH
• syndrom Bland-White-Garland * chirurgie   diagnóza   terapie   MeSH
• výsledek terapie MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• Publikační typ
• kazuistiky MeSH

Changes in QRS duration and pattern are regarded to reflect severe ischemia in acute coronary syndromes (ACS), and ventricular conduction blocks (VCBs) are recognized high-risk markers in both ACS and acute heart failure. Our aim was to evaluate the prevalence, temporal evolution, association with clinical and angiographic parameters, and impact on mortality of VCBs in ACS-related cardiogenic shock (CS). Data of 199 patients with ACS-related CS from a prospective multinational cohort were evaluated with electrocardiogram data from baseline and day 3. VCBs including left or right bundle branch block, right bundle branch block and hemiblock, isolated hemiblocks, and unspecified intraventricular conduction delay were assessed. Fifty percent of patients had a VCB at baseline; these patients were older, had poorer left ventricular function and had more often left main disease compared with those without VCB. One-year mortality was over 2-fold in patients with VCB compared with those without VCB (68% vs 32%, p<0.001). All types of VCBs at baseline were associated with increased mortality, and the predictive value of a VCB was independent of baseline variables and coronary angiography findings. Interestingly, 37% of the VCBs were transient, i.e., disappeared before day 3. However, 1-year mortality was much higher in these patients (69%) compared to patients with persistent (38%) or no VCB (15%, p<0.001). Indeed, a transient VCB was a strong independent predictor of 1-year mortality. In conclusion, our findings propose that any VCB in baseline electrocardiogram, even if transient, identifies very early patients at particularly high mortality risk in ACS-related CS.

• MeSH
• akutní koronární syndrom komplikace   mortalita   patofyziologie   MeSH
• blokáda Tawarova raménka epidemiologie   etiologie   patofyziologie   MeSH
• dospělí MeSH
• elektrokardiografie * MeSH
• kardiogenní šok komplikace   mortalita   patofyziologie   MeSH
• koronární angiografie MeSH
• lidé středního věku MeSH
• lidé MeSH
• míra přežití trendy   MeSH
• následné studie MeSH
• prevalence MeSH
• převodní systém srdeční patofyziologie   MeSH
• prospektivní studie MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• srdeční komory patofyziologie   MeSH
• Check Tag
• dospělí MeSH
• lidé středního věku MeSH
• lidé MeSH
• mužské pohlaví MeSH
• senioři nad 80 let MeSH
• senioři MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH
• pozorovací studie MeSH
• práce podpořená grantem MeSH
• Geografické názvy
• Česká republika MeSH

BACKGROUND: Electromechanical discoordination may contribute to long-term pulmonary right ventricular (RV) dysfunction in patients after surgery for congenital heart disease. We sought to evaluate changes in RV function after temporary RV cardiac resynchronization therapy. METHODS AND RESULTS: Twenty-five patients aged median 12.0 years after repair of tetralogy of Fallot and similar lesions were studied echocardiographically (n=23) and by cardiac catheterization (n=5) after primary repair (n=4) or after surgical RV revalvulation for significant pulmonary regurgitation (n=21). Temporary RV cardiac resynchronization therapy was applied in the presence of complete right bundle branch block by atrial-synchronized RV free wall pacing in complete fusion with spontaneous ventricular depolarization using temporary electrodes. The q-RV interval at the RV free wall pacing site (mean 77.2% of baseline QRS duration) confirmed pacing from a late activated RV area. RV cardiac resynchronization therapy carried significant decrease in QRS duration (P<0.001) along with elimination of the right bundle branch block QRS morphology, increase in RV filling time (P=0.002), pulmonary artery velocity time integral (P=0.006), and RV maximum +dP/dt (P<0.001), and decrease in RV index of myocardial performance (P=0.006). RV mechanical synchrony improved: septal-to-lateral RV mechanical delay decreased (P<0.001) and signs of RV dyssynchrony pattern were significantly abolished. RV systolic stretch fraction reflecting the ratio of myocardial stretching and contraction during systole diminished (P=0.001). CONCLUSIONS: In patients with congenital heart disease and right bundle branch block, RV cardiac resynchronization therapy carried multiple positive effects on RV mechanics, synchrony, and contraction efficiency.

• MeSH
• biomechanika MeSH
• blokáda Tawarova raménka diagnostické zobrazování   etiologie   patofyziologie   terapie   MeSH
• časové faktory MeSH
• dítě MeSH
• dysfunkce pravé srdeční komory diagnostické zobrazování   etiologie   patofyziologie   MeSH
• elektrofyziologické techniky kardiologické MeSH
• elektrokardiografie MeSH
• Fallotova tetralogie komplikace   diagnostické zobrazování   patofyziologie   chirurgie   MeSH
• funkce pravé komory srdeční * MeSH
• hemodynamika MeSH
• kardiochirurgické výkony * MeSH
• kontrakce myokardu * MeSH
• lidé MeSH
• mladiství MeSH
• obnova funkce MeSH
• pulzní dopplerovská echokardiografie MeSH
• srdeční katetrizace MeSH
• srdeční resynchronizační terapie * MeSH
• výsledek terapie MeSH
• Check Tag
• dítě MeSH
• lidé MeSH
• mladiství MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• Publikační typ
• časopisecké články MeSH

BACKGROUND: Alcohol septal ablation (ASA) is a catheter-based intervention that has been used as an alternative to surgical myectomy in highly symptomatic patients with hypertrophic obstructive cardiomyopathy (HOCM). However, clinically relevant complications can result, including death and complete heart block (CHB) associated with syncope or resuscitation. This study was designed to evaluate the incidence of major ASA-related adverse cardiac events. METHODS: This international multicentre retrospective study included 421 patients in 8 European centres who were treated using ASA from April 1998 to January 2011. Clinical and echocardiographic follow-up (3-6 months) was completed in 394 patients (94%). RESULTS: ASA led to a significant reduction in symptoms and outflow gradients, with 0.7% mortality. A total of 70 patients (17%) experienced mostly transient CHB during and after the procedure; in 30% of them, CHB occurred or recurred later than 24 hours after ASA. Ninety-seven percent of CHB occurred up to the fifth day after ASA. Permanent pacemakers for CHB were implanted in 35 patients (8%). Multivariate analysis identified intraprocedural bundle branch block and age as independent predictors of CHB. CONCLUSIONS: The results of the multicentre study demonstrate that ASA appears safe and efficacious, with low early mortality. The most frequent major complication after ASA was CHB (17%), which occurred late or was recurrent in almost one-third of these patients; 8% of patients required permanent pacemaker implantation. Independent predictors of CHB development were intraprocedural bundle branch block and age. Difficulty in predicting CHB should lead to close postprocedural monitoring and hospital stays lasting at least 5 days.

• MeSH
• ablace škodlivé účinky   MeSH
• atrioventrikulární blokáda etiologie   chirurgie   MeSH
• blokáda Tawarova raménka etiologie   MeSH
• ethanol terapeutické užití   MeSH
• hypertrofická kardiomyopatie chirurgie   MeSH
• kardiostimulátor MeSH
• lidé středního věku MeSH
• lidé MeSH
• multivariační analýza MeSH
• následné studie MeSH
• retrospektivní studie MeSH
• senioři MeSH
• srdeční septum chirurgie   MeSH
• věkové faktory MeSH
• Check Tag
• lidé středního věku MeSH
• lidé MeSH
• senioři MeSH
• Publikační typ
• časopisecké články MeSH
• multicentrická studie MeSH
• práce podpořená grantem MeSH