Exercise recommendations and risk factors for sudden cardiac death

Shock to the Heart: Psychosocial Implications and Applications of Sudden Cardiac Death in the Young

PURPOSE OF REVIEW

Although rare, sudden cardiac death (SCD) in the young is a tragic event, having a dramatic impact upon all involved. The psychosocial burden associated with SCD can leave friends, families, and entire communities bereft. With only limited evidence to describe the volatile emotional reactions associated with a young SCD, there is an urgent need for care providers to better understand the psychological complexities and impacts faced by both at-risk individuals and those directly affected by these tragic events.

RECENT FINDINGS

Current knowledge of the psychosocial implications associated with SCD in the young has recently generated interest in the cardiovascular community, with the goal of addressing prevention strategies (screening), family bereavement, and the psychological impact of at-risk or surviving individuals. With the emergence of novel strategies aimed at reducing the public health impact of SCD in the young, further discussion regarding the psychosocial impact of SCD, encompassing prevention, survivorship, and the downstream communal effects of a young death is required. Support systems and intervention could assist in the management of the associated psychosocial burden, yet there is a lack of clinical guidelines to direct this form of care. There is an important need for multidisciplinary collaboration across subspecialties to provide support to grieving individuals and manage patient well-being throughout the screening process for SCD. This collaborative approach requires the integration of cardiovascular and psychological expertise where relevant.

Rehabilitation of a Female Patient after Corrective Surgery for Tetralogy of Fallot

Herein we present a 25-year-old female patient with tetralogy of Fallot (TOF). This congenital heart defect is not very common, but it is the most common one among cyanotic heart defects. Treatment of the patients with TF is surgical, with palliative or curative (corrective) intent. Our patient underwent palliative surgery, definitive correction, and another surgery for pulmonary valve insufficiency. During cardiovascular rehabilitation, the patient was rhythmically stable, with excellent tolerance of physical exertion. Bearing in mind that this was a young female person who previously had had two spontaneous abortions, pregnancy was not absolutely contraindicated, although spontaneous abortion and pregnancy complications were more common in these patients.

A teen with chest pain

Chest pain is a frequent symptom and complaint in the teenage population. There are many common, benign causes of chest pain. However, it can create tremendous anxiety in the mind of the patient and family members and sometimes it can be perplexing even for the primary providers especially if there is associated family history of premature coronary artery disease. This article focuses on the evaluation of chest pain and how to differentiate between noncardiac and cardiac causes of chest pain in teenagers.

Cardiovascular screening of adolescent athletes

A preparticipation cardiovascular screening is recommended for all athletes with the aim of identifying conditions that increase the risk for adverse cardiac event, including sudden death. History and physical examination are the mainstay of cardiovascular screening of young athletes. The ability to identify athletes at risk, however, based on history and physical examination alone is low, and inclusion of an electrocardiogram as a screening tool has been suggested to improve the sensitivity of screening. This article provides an overview of key aspects of cardiovascular screening currently recommended in the United States for young athletes.

Tetralogy of Fallot

Tetralogy of Fallot is the most common form of cyanotic congenital heart disease, and one of the first to be successfully repaired by congenital heart surgeons. Since the first procedures in the 1950s, advances in the diagnosis, perioperative and surgical treatment, and postoperative care have been such that almost all those born with tetralogy of Fallot can now expect to survive to adulthood. The startling improvement in outcomes for babies born with congenital heart disease in general-and for those with tetralogy of Fallot in particular-is one of the success stories of modern medicine. Indeed, in many countries adults with tetralogy of Fallot outnumber children. Consequently, new issues have emerged, ranging from hitherto unpredicted medical complications to issues with training for caregivers and resource allocation for this population of survivors. Therefore, evolution of treatment, recognition of late complications, research on disease mechanisms and therapies-with feedback to changes in care of affected children born nowadays-are templates on which the timely discussion of organisation of care of those affected by congenital heart diseases from the fetus to the elderly can be based. Here, we focus on new developments in the understanding of the causes, diagnosis, early treatment, and late outcomes of tetralogy of Fallot, emphasising the continuum of multidisciplinary care that is necessary for best possible lifelong treatment of the 1% of the population born with congenital heart diseases.

Treatment of hypertension in children and adolescents

The treatment of hypertension in children and adolescents has been markedly changed in recent years by several factors, including the publication of new consensus recommendations, the obesity epidemic, and the increased availability of information on efficacy and safety of antihypertensive medications in the young. In this review we present an updated approach to the outpatient management of hypertension in the child or adolescent, utilizing representative cases to illustrate important principles as well as possible controversies.

Changes during exercise of ECG intervals related to increased risk for ventricular arrhythmia in repaired tetralogy of Fallot and their relationship to right ventricular size and function

PURPOSE

Our study aimed to assess pro-arrhythmogenic electrocardiographic changes during maximal physical exercise in patients operated for Tetralogy of Fallot (TOF).

METHODS

TOF patients prospectively underwent: 1) bicycle ergometry, 2) cardiac MRI, and 3) 24-hour Holter. ECG data was analyzed at rest, at 60% of peak exercise and at peak exercise. R-R duration, QRS-, QT- and JT-duration and dispersions were assessed. Changes of ECG parameters during exercise were calculated and correlated to RV volume, RVEF, RV wall-mass, PR-percentage and VO(2max). Exercise ECG data from healthy controls were used as reference.

RESULTS

Thirty-one patients (mean age at repair (SD) 0.8 (0.5) years, age at study 16 (5) years) and 25 controls (age 12 (2) years) were included. With exercise mean QTc and JTc dispersions increased in patients (p<0.001), but not in controls. At peak exercise JTc dispersion was larger in patients (p<0.01). QTc did not change with exercise in patients (p=0.14) and decreased in controls (p<0.05). At all levels of exercise mean QTc, QRS and QRS dispersion were larger in patients (all p<0.001). Significant associations were found for; 1) a larger increase of JTc dispersion with a higher PR-percentage, a larger RV volume, a larger RV wall-mass, 2) a larger QTc increase with a larger RV volume and worse RVEF.

CONCLUSION

During physical exercise inhomogeneity of repolarisation, known to predispose for re-entry ventricular arrhythmia, increases in repaired TOF. Larger inhomogeneity is found with more severe PR.

Long-term cardio-respiratory consequences of heart disease in childhood

The dynamic interaction between the heart and lungs leads to a degree of respiratory co-morbidity including both restrictive and obstructive airway abnormalities, which may be overlooked in children with congenital and acquired heart disease. The improving imaging techniques of the heart, both foetal and post-natal coupled with minimally invasive techniques for device implantation and better operative techniques for complex congenital heart disease have resulted in more children with longitudinally documented structural heart disease surviving into their adult years. Children presenting with cardiomyopathy or arrhythmias, as well as those with repaired cardiac disease, can be offered advice with regard to formal exercise testing and participation in sports, which may be particularly helpful in the adolescent years. Furthermore, through the interest of some adult cardiologists in paediatric heart disease over the past 20 years, facilities for the smooth transition of care to adult services are improving.

Differential diagnosis of chest symptoms in the athlete

Chest pain is a common complaint of athletes in all age groups. In athletes, chest pain is often attributed to "chest tightness," and treatment for bronchospasm is considered. However, the causes of the pain are wide and varied, and the pain is referable to the many organ systems that localize to the thorax. Therefore, when treatment with bronchodilators fails, it becomes important to consider other nonasthmatic causes of the pain. These causes can be organized by system and are explained in this article. Cardiac causes are the most feared and, fortunately, are very rare in the adolescent setting. With a thorough knowledge of etiologies of chest pain, the physician can often make a diagnosis with only a history and a physical exam.

Chest pain in children and adolescents

The focus of this article is to explore chest pain in children and adolescents. Common causes of chest pain and the approach to its evaluation are reviewed. Special emphasis is given to the cardiac causes of pediatric chest pain and how it can be differentiated from more common benign etiologies.