Importance of genotype for risk stratification in arrhythmogenic right ventricular cardiomyopathy using the 2019 ARVC risk calculator.

AIMS: To study the impact of genotype on the performance of the 2019 risk model for arrhythmogenic right ventricular cardiomyopathy (ARVC). METHODS AND RESULTS: The study cohort comprised 554 patients with a definite diagnosis of ARVC and no history of sustained ventricular arrhythmia (VA). During a median follow-up of 6.0 (3.1,12.5) years, 100 patients (18%) experienced the primary VA outcome (sustained ventricular tachycardia, appropriate implantable cardioverter defibrillator intervention, aborted sudden cardiac arrest, or sudden cardiac death) corresponding to an annual event rate of 2.6% [95% confidence interval (CI) 1.9-3.3]. Risk estimates for VA using the 2019 ARVC risk model showed reasonable discriminative ability but with overestimation of risk. The ARVC risk model was compared in four gene groups: PKP2 (n = 118, 21%); desmoplakin (DSP) (n = 79, 14%); other desmosomal (n = 59, 11%); and gene elusive (n = 160, 29%). Discrimination and calibration were highest for PKP2 and lowest for the gene-elusive group. Univariable analyses revealed the variable performance of individual clinical risk markers in the different gene groups, e.g. right ventricular dimensions and systolic function are significant risk markers in PKP2 but not in DSP patients and the opposite is true for left ventricular systolic function. CONCLUSION: The 2019 ARVC risk model performs reasonably well in gene-positive ARVC (particularly for PKP2) but is more limited in gene-elusive patients. Genotype should be included in future risk models for ARVC.

Sudden unexplained death in the young: epidemiology, aetiology and value of the clinically guided genetic screening.

Aims: To determine the incidence and the causes of sudden death (SD) in persons aged 1-35 years old and the diagnostic yield of clinically guided genetic screening in the sudden arrhythmic death syndrome (SADS) victims' families. Methods and results: Incidence and causes of SD in the Attica region of Greece in 2002-10 were determined using death certificates and autopsy reports. We evaluated clinically consecutive families of SADS victims and if a clinical diagnosis was established, we proceeded to targeted genetic analysis. Out of 6030 deaths, 56% were due to traumatic or violent causes, 40.5% were natural deaths, and 3.3% were of undetermined cause. There were 349 SD cases. Cardiovascular causes accounted for 65%, non-cardiovascular causes for 17%, and SADS for 18%. Clinical evaluation identified an inherited heart disease in 5/20 SADS families (25%). Targeted genetic analysis identified a causative mutation in all of the five screened families and reconfirmed the diagnosis in three of five proband victims. Clinical and genetic evaluation of 28 family members identified eight affected carriers and eight non-affected carriers. Molecular autopsy failed to identify any of these families. Conclusion: Sudden death in the young is of cardiovascular origin in the majority of cases. A considerable rate of SD cases remains of unknown cause on post-mortem. Apart from channelopathies, subclinical forms of inherited structural heart diseases would appear to be implicated in SADS. Clinically guided genetic screening has a significant diagnostic yield and identifies affected families that would have been missed by the current suggested molecular autopsy panel.

International External Validation Study of the 2014 European Society of Cardiology Guidelines on Sudden Cardiac Death Prevention in Hypertrophic Cardiomyopathy (EVIDENCE-HCM).

BACKGROUND: Identification of people with hypertrophic cardiomyopathy (HCM) who are at risk of sudden cardiac death (SCD) and require a prophylactic implantable cardioverter defibrillator is challenging. In 2014, the European Society of Cardiology proposed a new risk stratification method based on a risk prediction model (HCM Risk-SCD) that estimates the 5-year risk of SCD. The aim was to externally validate the 2014 European Society of Cardiology recommendations in a geographically diverse cohort of patients recruited from the United States, Europe, the Middle East, and Asia. METHODS: This was an observational, retrospective, longitudinal cohort study. RESULTS: The cohort consisted of 3703 patients. Seventy three (2%) patients reached the SCD end point within 5 years of follow-up (5-year incidence, 2.4% [95% confidence interval {CI}, 1.9-3.0]). The validation study revealed a calibration slope of 1.02 (95% CI, 0.93-1.12), C-index of 0.70 (95% CI, 0.68-0.72), and D-statistic of 1.17 (95% CI, 1.05-1.29). In a complete case analysis (n= 2147; 44 SCD end points at 5 years), patients with a predicted 5-year risk of <4% (n=1524; 71%) had an observed 5-year SCD incidence of 1.4% (95% CI, 0.8-2.2); patients with a predicted risk of ≥6% (n=297; 14%) had an observed SCD incidence of 8.9% (95% CI, 5.96-13.1) at 5 years. For every 13 (297/23) implantable cardioverter defibrillator implantations in patients with an estimated 5-year SCD risk ≥6%, 1 patient can potentially be saved from SCD. CONCLUSIONS: This study confirms that the HCM Risk-SCD model provides accurate prognostic information that can be used to target implantable cardioverter defibrillator therapy in patients at the highest risk of SCD.

Arrhythmic risk assessment in genotyped families with arrhythmogenic right ventricular cardiomyopathy.

AIMS: Arrhythmogenic right-ventricular cardiomyopathy (ARVC) is a genetically determined disorder, mostly caused by mutations in genes encoding desmosomal proteins. We evaluated phenotype/genotype characteristics to predict the risk for the first major arrhythmic event in desmosomal-mutation-associated ARVC families. METHODS AND RESULTS: A cohort of 105 desmosomal-mutation carriers belonging to 39 consecutive ARVC families was evaluated. Serial clinical work-up consisting of history, physical examination, 12-lead/signal-averaged/24 h ambulatory ECG, and two-dimensional echocardiography was performed every 6-12 months. The predictive value of gender and genotype for the first major arrhythmic event was investigated within the cohort using time-to-event analysis. ECG/echocardiographic features were evaluated at the time of event and associated with the outcome using an age-matched nested case-control study within the cohort. Forty-three (41%) participants experienced the primary arrhythmic outcome at median age of 29 (21-46) years. The first event was sustained ventricular tachycardia in 31 and sudden cardiac death in 12. Definite diagnosis according to the 2010 Task Force criteria, showed 57% positive and 100% negative predictive value for the occurrence of arrhythmic outcome. Male gender (hazard ratio = 3.26, 95%CI, 1.63-6.51), predicted the first major arrhythmic event, independently of genotype, on multivariable analysis. Repolarization abnormalities and left-ventricular dysfunction independently associated with clinical disease profile at the time of event. CONCLUSION: Male gender, independently of genotype is an arrhythmic risk predictor in ARVC-associated desmosomal-mutation carriers. Repolarization abnormalities and left-ventricular dysfunction are important components of the first event-associated clinical disease profile.

Clinical Significance of Epsilon Waves in Arrhythmogenic Cardiomyopathy.

INTRODUCTION: Epsilon waves are hallmark features of arrhythmogenic cardiomyopathy (ACM) but information about their clinical significance is variable. We evaluated epsilon wave prevalence, characteristics, and their clinical significance in an ACM population. METHODS AND RESULTS: Eighty-six unselected patients fulfilling the 2010 Task Force criteria were enrolled. Seventy-six of them were carriers of desmosomal mutations. All subjects were serially evaluated with standard 12-lead ECG and 2-dimensional echocardiography. Epsilon waves were evaluated in all precordial and inferior leads. Novel parameters assessed included their duration and precordial/inferior lead extension. Twenty-five subjects (29%) had epsilon waves that were present in lead V3 and beyond in 9, and in the inferior leads in 7. Epsilon waves were associated with right ventricular outflow tract (RVOT) (P = 0.001) but not RV posterior wall (P = 0.21), RV apex (P = 0.30), or left ventricular (P = 0.94) wall motion abnormalities. Patients with epsilon waves had increased RVOT diameter (P < 0.0001). Extension of epsilon waves in lead V3 and beyond was associated with increased epsilon wave duration (P = 0.002) and RVOT diameter (P = 0.04). The duration of epsilon waves was positively correlated with RVOT diameter (r = 0.70, P = 0.0001). Epsilon waves were also associated with episodes of sustained ventricular tachycardia (P = 0.004) but not with heart failure (P = 0.41) or sudden cardiac death (P = 0.31). CONCLUSION: Detection of epsilon waves on 12-lead ECG reflects significant RVOT involvement, which was associated with episodes of sustained ventricular tachycardia but not sudden cardiac death.

The Greek version of the 9-item European Heart Failure Self-care Behaviour Scale: a multidimensional or a uni-dimensional scale?

OBJECTIVES: To evaluate the dimensionality of the Greek version of the European Heart Failure Self-care Behaviour Scale (Gr9-EHFScBS) in a Greek-Cypriot population. BACKGROUND: EHFScBS is a valid and reliable scale which is widely used for assessing heart failure (HF) patients' self-care behaviors. METHODS: EHFScBS was translated into Greek and was administered to 128 Greek-Cypriot HF patients. The internal consistency, construct validity and discriminant validity of the scale were assessed. RESULTS: Confirmatory factor analysis failed to capture the proposed theoretical structure. Further exploratory factor analysis provided a three-factor solution accounting for 53.35% of the variance, though the scale is better used as a whole. Cronbach's alpha was moderate 0.66, but deletion of any item decreased the alpha coefficient. Discriminant validity was supported by the poor correlation between EHFScBS and Minnesota Living with Heart Failure Questionnaire scores. CONCLUSION: Even though results do not conform to the multidimensionality of the scale, assessment of the tool provided acceptable validity and reliability measures to support its usage among Greek speaking populations.

Epidemiology of acute coronary syndromes in the Mediterranean island of Cyprus (CYPACS study, Cyprus study of acute coronary syndromes).

INTRODUCTION: So far, no studies have been performed regarding the epidemiology and management of acute coronary syndromes (ACS) in Cyprus. The aim of the present study was to enroll a representative sample of patients in order to study the epidemiology and management of ACS in the Mediterranean island of Cyprus. METHODS: For a period of 12 months, all patients admitted to Nicosia General Hospital with an ACS were studied. The calculation of the annual incidence of ACS was based on the number of all ACS cases registered during one year in the Nicosia district. The results from the province of Nicosia can be considered as representative of the whole ACS profile in Cyprus. RESULTS: The annual incidence of ACS in the Nicosia district was 160 per 100,000 inhabitants (41 per 100,000 women and 282 per 100,000 men). This percentage translates into 1342 ACS episodes annually among the Cypriot population. The ratio of men to women was 6.8:1. More female ACS patients than men had hypertension (67.3% vs. 46.3%, p=0.005) and were passive smokers (53.8% vs. 47.7%, p=0.4), while male patients with ACS included a significantly greater percentage of smokers compared to women (51.3% vs. 13.5%, p<0.001). Regarding the type of ACS, 45% of patients were diagnosed with STEMI, 41.3% with NSTEMI and 13.7% with unstable angina. The majority of patients with STEMI were treated with medical reperfusion. The in-hospital mortality rate was 3.5%. CONCLUSIONS: The annual incidence of ACS in Cyprus is below the European average. The management of ACS is similar to that in southern Europe. The majority of patients with STEMI are treated with pharmacological reperfusion. The small geographical area of the island provides the advantage of early reperfusion to the majority of patients, which results in very low in-hospital mortality.

Reperfusion therapy for ST elevation acute myocardial infarction 2010/2011: current status in 37 ESC countries.

AIMS: Primary percutaneous coronary intervention (PPCI) is the preferred reperfusion therapy in ST-elevation myocardial infarction (STEMI). We conducted this study to evaluate the contemporary status on the use and type of reperfusion therapy in patients admitted with STEMI in the European Society of Cardiology (ESC) member countries. METHODS AND RESULTS: A cross-sectional descriptive study based on aggregated country-level data on the use of reperfusion therapy in patients admitted with STEMI during 2010 or 2011. Thirty-seven ESC countries were able to provide data from existing national or regional registries. In countries where no such registries exist, data were based on best expert estimates. Data were collected on the use of STEMI reperfusion treatment and mortality, the numbers of cardiologists, and the availability of PPCI facilities in each country. Our survey provides a brief data summary of the degree of variation in reperfusion therapy across Europe. The number of PPCI procedures varied between countries, ranging from 23 to 884 per million inhabitants. Primary percutaneous coronary intervention and thrombolysis were the dominant reperfusion strategy in 33 and 4 countries, respectively. The mean population served by a single PPCI centre with a 24-h service 7 days a week ranged from 31 300 inhabitants per centre to 6 533 000 inhabitants per centre. Twenty-seven of the total 37 countries participated in a former survey from 2007, and major increases in PPCI utilization were observed in 13 of these countries. CONCLUSION: Large variations in reperfusion treatment are still present across Europe. Countries in Eastern and Southern Europe reported that a substantial number of STEMI patients are not receiving any reperfusion therapy. Implementation of the best reperfusion therapy as recommended in the guidelines should be encouraged.

[Conflict of interest policies and disclosure requirements among European Society of Cardiology national cardiovascular journals]. / Políticas de conflictos de intereses y requisitos para su declaración en las revistas cardiovasculares nacionales de la Sociedad Europea de Cardiología.

Disclosure of potential conflicts of interest is used by biomedical journals to guarantee credibility and transparency of the scientific process. Conflict of interest disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for conflicts of interest disclosure. This paper provides a comprehensive editorial perspective on classical conflict of interest-related issues. New insights into current conflicts of interest policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardized questionnaire, are discussed.

Homocysteine levels and MTHFR polymorphisms in young patients with acute myocardial infarction: a case control study.

INTRODUCTION: Increased levels of homocysteine are known to be associated with coronary artery disease (CAD). The most common form of genetic hyperhomocysteinemia results from MTHFR polymorphisms. To examine the role of homocysteine levels and MTHFR polymorphisms in premature CAD and acute myocardial infarction (MI) in the Cypriot population, a case control study was performed in Nicosia General Hospital. METHODS: Sixty-three male patients less than 50 years old who presented with MI in Nicosia General Hospital were compared with 54 controls without CAD. Fasting homocysteine and lipids were tested within 24 hrs from admission, while MTHFR C677T and A1298C polymorphisms were also tested. RESULTS: Mean homocysteine levels were 14.5 mol/L in patients and 12.3 mol/L in controls (p=0.017). Mutant homozygous MTHFR C677T was present in 17.7% of the patients and 19.2% of the controls (p=0.838), while mutant homozygous MTHFR A1298C was found in 16.1% of patients and 13.5% of controls (p=0.690). Mean homocysteine levels were 12.6 mol/L in patients with single-vessel CAD and 15.5 mol/L in patients with multi-vessel CAD (p=0.025). Lower HDL appeared to be associated with higher levels of homocysteine with an odds ratio of 0.901, indicating that for each unit increase in HDL, the expected odds of having high homocysteine levels decreased by approximately 10%. CONCLUSIONS: Higher levels of homocysteine are associated with acute MI and multi-vessel disease in Cypriot patients under the age of 50. The existence and extent of disease are not associated with MTHFR polymorphisms. Lower HDL is associated with higher levels of homocysteine.

Políticas de conflictos de intereses y requisitos para su declaración en las revistas cardiovasculares nacionales de la Sociedad Europea de Cardiología / Conflict of interest policies and disclosure requirements among european society of cardiology national cardiovascular journals

Las revistas biomédicas utilizan la declaración de posibles conflictos de intereses para garantizar la credibilidad y la transparencia del proceso científico. Sin embargo, las revistas no abordan la declaración de conflictos de intereses de manera sistemática ni uniforme. Recientes esfuerzos editoriales conjuntos han abierto el camino a la aplicación de herramientas uniformes para la declaración de conflictos de intereses. En este artículo se presenta una visión integral sobre cuestiones clásicas relacionadas con los conflictos de intereses desde un punto de vista editorial. Además, a partir de los datos de un estudio transversal basado en el empleo de un cuestionario estandarizado, se comentan nuevas apreciaciones sobre las políticas y los actuales procedimientos editoriales relativos a los conflictos de intereses en las diversas revistas cardiovasculares nacionales de la Sociedad Europea de Cardiología.

Disclosure of potential conflicts of interest is used by biomedical journals to guarantee credibility and transparency of the scientific process. Conflict of interest disclosure, however, is not systematically nor consistently dealt with by journals. Recent joint editorial efforts paved the way towards the implementation of uniform vehicles for conflicts of interest disclosure. This paper provides a comprehensive editorial perspective on classical conflict of interest-related issues. New insights into current conflicts of interest policies and practices among European Society of Cardiology national cardiovascular journals, as derived from a cross-sectional survey using a standardized questionnaire, are discussed.

A penetrating heart injury resulting in ventricular septal defect.

Penetrating heart injuries can be lethal. Here we report a case of self-inflicted cardiac injury with glass fragments by a psychiatric patient. The patient presented with cardiogenic shock and was initially treated surgically for a large pneumothorax and cardiac tamponade. A few days later she presented with dyspnoea and hypotension. An echo-Doppler study was performed and an acquired post-traumatic ventricular septal defect (VSD) with left-to-right shunt was diagnosed. The patient was transferred to theatre where the defect was successfully repaired. Post-traumatic VSD is a rare complication of penetrating heart injuries and has a tendency to present late. Follow up of such cases is recommended with repeat echocardiography.

Arrhythmogenic right ventricular cardiomyopathy/dysplasia on the basis of the revised diagnostic criteria in affected families with desmosomal mutations.

AIMS: To evaluate arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D) in affected families with desmosome mutations on the basis of the recently revised Task Force Criteria (TFC). METHODS AND RESULTS: One hundred and three consecutive carriers of pathogenic desmosome mutations and 102 mutation-negative relatives belonging to 22 families with dominant and 14 families with recessive ARVC/D were evaluated according to the original and revised TFC. Serial cardiac assessment with 12-lead, signal-averaged, and 24 h ambulatory ECG and two-dimensional echocardiography was performed. Clinical events and outcome were prospectively analysed up to 24 years (median 4 years). With the revised criteria, 16 carriers were newly diagnosed on the basis of ECG abnormalities in 100%, ventricular arrhythmias in 79%, and functional/structural alterations in 31%, increasing diagnostic sensitivity from 57 to 71% (P = 0.001). Task Force Criteria specificity improved from 92 to 99% (P = 0.016). In dominant mutation carriers, penetrance changed significantly (61 vs. 42%, P = 0.001); no changes were observed in recessive homozygous carriers (97 vs. 97%, P = 1.00). Affected carriers according to the revised TFC (n = 73) had 12-lead ECG abnormalities in 96%, ventricular arrhythmias in 91%, and functional/structural alterations fulfilling echocardiographic criteria in 76%. Cumulative and event-free survival did not differ significantly between dominant and recessive affected carriers, being at 78.6 vs. 76 and 51.7 vs. 55.4%, respectively, by the age of 40 years. CONCLUSION: Revised TFC increased diagnostic sensitivity particularly in dominant ARVC/D. Serial family evaluation may rely on electrocardiography which seems to have the best diagnostic utility particularly in early disease that is not detectable by two-dimensional echocardiography.

Cardiac hemangioma in the left ventricle and brief review of the literature.

Cardiac hemangiomas are very rare benign cardiac tumors. They can present at any age and clinical presentation varies according to location and size. Most common symptoms include shortness of breath, palpitations, atypical chest pain and arrhythmia. The natural history of these tumors is unpredictable. They can regress, cease growing or proliferate over time. Diagnosis is usually made with echocardiography and surgical resection is the treatment of choice. Follow-up is recommended to identify any recurrence. We report a case of a 38-year-old man who presented with fatigue and palpitations. Echocardiography revealed a mobile spherical mass within the left ventricle, whereas left ventriculography showed an intracavity-filling defect without any tumor blushing. The tumor was removed surgically through the left atrium. It was a smooth oval nodule with a pedicle that was attached to the top of a papillary muscle. Microscopy revealed the presence of numerous vessels within fibrous tissue that ranged from lobules of capillary hemangioma to large thin-walled cavernous vessels, compatible with a hemangioma of mixed capillary-cavernous type. The patient had an uneventful postoperative course and recovered quickly.