Spanish Catheter Ablation Registry. Fifth official report of the Spanish Society of Cardiology Working Group on Electrophysiology and Arrhythmias (2005)

INTRODUCTION AND OBJECTIVES: The findings (i.e., success and complication rates) of the 2005 Spanish Catheter Ablation Registry, as prepared by the Spanish Society of Cardiology Working Group on Electrophysiology and Arrhythmias, are presented. METHODS: As in previous years, data were collected in two ways: retrospectively using a standardized questionnaire sent to electrophysiology laboratories by the Working Group on Electrophysiology and Arrhythmias, and prospectively from a central database. Each participating center selected its own preferred method of data collection. RESULTS: Forty-seven centers contributed data to the registry. A total of 6162 ablation procedures were analyzed, averaging 131 (88) per center. As in previous reports, the three main conditions treated were atrioventricular nodal reentrant tachycardia (n=1795, 29%), accessory pathways (n=1591, 26%), and typical atrial flutter (n=1378, 22%). Atrial fibrillation was the fourth most common condition treated (n=480, 8%). The overall success rate was 93%, major complications occurred in 1.05%, and the mortality rate was 0.03%. CONCLUSIONS: With more than 6000 ablation procedures recorded and with the participation of a greater number of centers throughout the country, the Spanish Catheter Ablation Registry is becoming increasingly representative and is consolidating its value as a point of reference. The number of catheter ablations carried out for atrial fibrillation in Spain is continuing to grow.     

Spanish catheter ablation registry. 10th official report of the Spanish Society of Cardiology Working Group on Electrophysiology and Arrhythmias (2010)

Introduction and objectives

The findings of the 2010 Spanish Catheter Ablation Registry are presented.

Methods

Data were collected in two ways: retrospectively using a standardized questionnaire, and prospectively from a central database. Each participating center selected its own preferred method of data collection.

Results

Fifty-seven Spanish centers voluntarily contributed data to the survey. A total of 8762 ablation procedures was analyzed, averaging 154 (97) per center. The 3 main conditions treated were atrioventricular nodal reentrant tachycardia (n=2321; 27%), typical atrial flutter (n=1839; 22%), and accessory pathways (n=1738; 20%). Atrial fibrillation was the fourth most common condition treated (n=1309; 15%), and reflects mild growth. The overall success rate was 94%, major complications occurred in 1.7%, and the overall mortality rate was 0.06%.

Conclusions

Data from the 2010 registry show that the number of ablations carried out continued to increase and exceeded 8700 ablations for the second time. In addition, they show, in general, a higher success rate and a lower number of complications. Again, cavotricuspid isthmus ablation for typical atrial flutter was the second most common condition treated. The number of catheter ablations carried out for ventricular arrhythmias in Spain is growing compared to the previous year.Full English text available from:www.revespcardiol.org     

Post-infarction ventricular tachycardia with a QRS complex narrower than 140 ms: characterization and catheter ablation

Typically, sustained monomorphic ventricular tachycardia (SMVT) in patients with a previous myocardial infarction (MI) is characterized by a wide QRS complex. However, occasionally patients present with SMVT and a narrow QRS complex (N-SMVT). We studied retrospectively the incidence of N-SMVT (i.e., QRS interval <140 ms) in patients with a previous MI and inducible SMVT who underwent electrophysiological evaluation. Of the 135 consecutive patients with inducible SMVT, 8 (5.9%) presented with inducible N-SMVT. The mean QRS complex duration in patients with N-SMVT was 126 (8) ms. Radiofrequency ablation was successful in 5 out of 6 patients (83%). One of the remaining two received an implantable defibrillator, while the other was given amiodarone. Findings during radiofrequency ablation showed that the reentry circuit was located in the left septum in 4 out of the 5 patients (80%). N-SMVT is relatively uncommon, but the success rate of radiofrequency ablation is high. The reentry circuit is most often located in the septum.     

Spanish implantable cardioverter-defibrillator registry. Seventh official report of the spanish society of cardiology working group on implantable cardioverter-defibrillators (2010)

Introduction and objectives

The authors summarize the findings of the Spanish Implantable Cardioverter-Defibrillator Registry for 2010 compiled by the Spanish Society of Cardiology Working Group on Implantable Cardioverter-Defibrillators.

Methods

Members of the Spanish Society of Cardiology were prospectively surveyed; data were recorded voluntarily by each implantation team on one-page questionnaires.

Results

In total, 4627 device implantations were reported, comprising 85.6% of the overall estimated number of implantations. The reported implantation rate was 100.61 per million population and the estimated total implantation rate was 117.50 per million. The proportion of first implantations was 73.87%. We collected data from 143 hospitals (9 more than in 2009). The majority of the implantable cardioverter-defibrillator implantations were performed in men (81%). The mean age was 62.5±13 years. Most of the patients had severe or moderate-to-severe ventricular dysfunction and were in New York Heart Association functional class II. Ischemic heart disease was the most frequent underlying cardiac condition, followed by dilated cardiomyopathy. The number of implantable cardioverter-defibrillator implantations indicated for primary prevention increased over the previous year and now accounts for 65.6% of first implantations. In all, 76.1% of the implantable cardioverter-defibrillator implantations were performed by cardiac electrophysiologists.

Conclusions

The 2010 Spanish Implantable Cardioverter-Defibrillator Registry includes data on almost 86% of all the implantable cardioverter-defibrillator implantations performed in Spain. Although the number has continued to increase, it still remains far lower than the European average. There has been a significant increase in the number of implantations indicated for primary prevention.Full English text available from:www.revespcardiol.org     

Spanish Registry of Catheter Ablation. Third Official Report of the Working Group on Electrophysiology and Arrhythmias of the Spanish Society of Cardiology (2003)

INTRODUCTION: The results of the Third Spanish Catheter Ablation Registry, developed by the Working Group on Electrophysiology and Arrhythmias, are presented for the third consecutive year (2003). MATERIAL AND METHOD: In contrast to previous years, data were collected in two different ways at the discretion of the participating center. Retrospective were obtained with a standard questionnaire, as in previous years. Prospective data were obtained from a database of records completed after each ablation was performed. Results and complications are presented according to different arrhythmic substrates. RESULTS: Thirty-nine centers participated in the registry (25 supplied prospective data and 14 retrospective data), representing more than 80% of all electrophysiological laboratories in Spain. A total number of 4354 ablations were recorded (111 procedures per center, 2723 from the prospective registry and 1631 from the retrospective one). The substrate most frequently treated was AV nodal reentry tachycardia (31.6%, 98% success), followed by accessory pathways (26%, 89% success) and atrial macro-reentry tachycardia (23%, 90% success). The incidence of complications was 1.7% and mortality was 0.11%. With the prospective registry we obtained more comprehensive information individualized for each procedure (age, sex, underlying cardiomyopathy, anticoagulation, sedation, type of catheter, etc.). CONCLUSIONS: The high rate of participation in the registry and the consistency of the results with previous years help to consolidate the registry as a reference for the rest of the scientific community. The results from the prospective registry showed better-quality information and more detailed reporting of results and complications.     

Spanish Catheter Ablation Registry. 17th Official Report of the Spanish Society of Cardiology Working Group on Electrophysiology and Arrhythmias (2017)

Introduction and objectives

This report describes the findings of the 2017 Spanish Catheter Ablation Registry.

Spanish Registry on Catheter Ablation. Second official report of the Working Group on Electrophysiology and Arrhythmias of the Spanish Society of Cardiology (2002)

INTRODUCTION AND OBJECTIVES: We present the results (success rates and complication rates) for the second consecutive year of the 2002-Spanish Catheter Ablation Registry, developed by the Spanish Society of Cardiology. MATERIAL AND METHOD: Data were collected retrospectively by questionnaires sent to all interventional cardiology laboratories in Spain. The outcomes and complications of ablation procedures performed during 2002 were classified according to the substrate or mechanism of arrhythmia treated. RESULTS: Forty-three centers voluntarily submitted completed questionnaires. The number of procedures analyzed was 4970, performed at 42 centers, for a mean of 118 78 procedures per center. Global outcome rates were success in 93%, major complications in 1.2%, and death in 0.04% of the patients. The three main substrates treated were AV nodal reentry (29%), accessory pathways (28%) and common atrial flutter (24%). CONCLUSIONS: The 2002 Spanish National Catheter Ablation Registry reports the activity of the majority (90%) of interventional cardiology laboratories in Spain. The efficacy of catheter ablation procedures in Spain is high, and the complication and mortality rates are low.     

Spanish registry on catheter ablation. 1st official report of the working group on electrophysiology and arrhythmias of the Spanish Society of Cardiology (year 2001)

BACKGROUND AND OBJECTIVES: The information about the practice and results of catheter ablation of cardiac arrhythmias in Europe is limited and there is a lack of multicenter studies and registries. The Spanish Society of Cardiology developed a national registry to define the results of this procedure and the characteristics of the laboratories where it is performed. METHODS: A list of electrophysiology laboratories in Spain was prepared and questionnaires were sent to each of them. The questionnaires were completed with retrospective data about the characteristics of each center, their general activities, and ablation procedures performed during 2001. Data were collected on the results and complications in relation to the arrhythmic substrate or mechanism treated. RESULTS: Forty-three centers, out of a possible 48, voluntarily participated in the registry. A total of 4,374 ablation procedures were performed in 41 centers. The average number of procedures per center was 106 84 and the rates of success, major complications, and mortality were, respectively, 93%, 1.5%, and 0.1%. About 70% of the procedures were performed to treat patients with AV nodal reentrant tachycardias and accessory pathways or to abolish AV conduction. CONCLUSIONS: The 2001 Spanish National Catheter Ablation Registry is one of the largest reported series of ablation procedures. The results of the registry demonstrate a high success rate and low complication and mortality rates in the practice of catheter ablation in Western Europe.     

Spanish Cardiac Catheterization and Coronary Intervention Registry. 16th Official Report of the Spanish Society of Cardiology Working Group on Cardiac Catheterization and Interventional Cardiology (1990-2006)

This article summarizes the data reported to the 2006 registry of the Spanish Society of Cardiology Working Group on Cardiac Catheterization and Interventional Cardiology. Data were obtained from 135 centers. Of these, 125 performed catheterizations mainly in adults, while 10 carried out procedures in pediatric patients only. In 2006, 126,196 diagnostic catheterizations were carried out. Of these, 113,228 were coronary angiograms, 7.6% more than in 2005. The population-adjusted rate was 2560 coronary angiograms per million inhabitants. A total of 57,041 percutaneous coronary interventions were performed, which was 7.8% more than in the previous year and which corresponds to a rate of 1293 per million inhabitants. Stents were used in 96.1% of coronary interventions. Overall, 90,006 stents were implanted, of which 59.3% were drug-eluting stents. Moreover, 10,067 interventions were carried out for acute myocardial infarction, 20.6% more than in 2005 and accounting for 17.6% of all percutaneous coronary interventions. Non-coronary interventions were most frequently performed for adult congenital heart disease, with closure of an atrial septal defect being the most numerous, at 334 procedures. Percutaneous mitral valvuloplasties were performed in 431 cases, a similar figure to that recorded in the previous registry, and the success rate was 93.6%. Each year, radial access continues to be used more frequently for coronary procedures. Finally, it is important to emphasize that a high percentage of laboratories reported results, which ensures that the data presented here can serve as an international reference source for percutaneous cardiac interventions performed in Spain.     

The frequency of systolic aortic regurgitation and its relationship to heart failure in a consecutive series of patients

Although aortic regurgitation is a diastolic phenomenon, it has been observed during systole in a few cases. Our aims were to determine the incidence of systolic aortic regurgitation in routine clinical practice and to investigate the clinical profiles of patients with the condition. An exhaustive prospective study of all investigations performed by a hospital echocardiographic unit over one month was carried out. Systolic aortic regurgitation was detected in five out of a total of 216 investigations (2.3%). In all cases, the patient had some degree of heart failure. Overall, the condition was present in 5.9% of patients with heart failure. In one patient with atrial fibrillation, systolic aortic regurgitation disappeared and the patient's clinical status improved after atrioventricular node modulation using a cryoablation catheter. Systolic aortic regurgitation was not an exceptional occurrence in hospitalized patients. Moreover, it tended to be specifically associated with heart failure.     

Spanish Heart Transplantation Registry. 16th official report of the Spanish Society of Cardiology Working Group on Heart Failure, Heart Transplantation, and Associated Therapies

This paper describes the general situation regarding heart transplantation in Spain and the results obtained using the technique, incorporating data for the year 2004. In 2004, 294 heart transplants were carried out, which brings the total number of procedures performed since 1984 to 4680. Clinically, the typical heart transplant recipient in Spain is male, aged around 50 years, has blood group A, has non-revascularizable coronary artery disease, and is in NYHA functional class IV/IV. The percentage of emergency heart transplantations was 35%, which is higher than in the previous year (29%), and higher than the mean for the preceding 5 years (22%). The early mortality rate was 10%, which is lower that the mean for the preceding 5 years (13%). After combining the results for 2004 with those of previous years, the probability of survival at 1, 5 and 10 years was 80%, 70% and 60%, respectively. When the survival rates for different time periods were analyzed, a significant improvement could be seen in the last 5 years, with recent survival rates being 85% and 72% at 1 and 5 years, respectively. The most frequent cause of death in the first month was acute graft failure; in the first year, infection and rejection; and, over the long term, tumors and a combination of graft vasculopathy and sudden death. A comparative analysis of survival rates showed that long-term results in Spain are slightly better than those published in the world literature. Moreover, survival has tended to improve gradually in recent years.