Pressures in the right side of the heart and pulmonary capillary wedge can be obtained by cardiac catheterization without the aid of fluoroscopy. A No. 5 Fr double-lumen catheter with a balloon just proximal to the tip is inserted into the right atrium under pressure monitoring. The balloon is then inflated with 0.8 ml of air. The balloon is carried by blood flow through the right side of the heart into the smaller radicles of the pulmonary artery. In this position when the balloon is inflated wedge pressure is obtained. The average time for passage of the catheter from the right atrium to the pulmonary artery was 35 seconds in the first 100 passages. The frequency of premature beats was minimal, and no other arrhythmias occurred.

https://www.nejm.org/doi/pdf/10.1056/NEJM197008272830902?listPDF=true

Catheterization of the Heart in Man with Use of a Flow-Directed Balloon-Tipped Catheter

It is important that the medical profession play a central role in critically evaluating the use of diagnostic procedures and therapies introduced and tested for detection, management, or prevention of disease. Rigorous, expert analysis of the available data documenting absolute and relative

/pdf/acc-aha-2008-guidelines-for-the-management-of-adults-with-4oqjti8ewr.pdf

ACC/AHA 2008 guidelines for the management of adults with congenital heart disease: Executive summary - A report of the American College of Cardiology/American Heart Association Task Force on practice guidelines (writing committee to develop guidelines for the management of adults with congenital heart disease)

https://www.hefssa.org/images/uploads/acc_aha_guidelines_for_adults_with_chd.pdf

ACC/AHA 2008 Guidelines for the Management of Adults With Congenital Heart Disease

Prevalence of congenital heart disease

Cyanotic Conditions Patients with cyanotic congenital heart disease have arterial oxygen desaturation resulting from the shunting of systemic venous blood to the arterial circulation. The magnitude of shunting determines the severity of desaturation. Most children with cyanotic heart disease do not survive to adulthood without surgical intervention. In adults, the most common causes of cyanotic congenital heart disease are tetralogy of Fallot61 and Eisenmenger's syndrome. Tetralogy of Fallot Tetralogy of Fallot, the most common cyanotic congenital heart defect after infancy, is characterized by a large ventricular septal defect, an aorta that overrides the left and right ventricles, obstruction of the . . .

https://www.nejm.org/doi/pdf/10.1056/NEJM200001273420407?listPDF=true

Congenital heart disease in adults: First of two parts

Heart Disease in Infancy and Childhood

A group of 37 children is described in whom a systolic murmur heard early in life gradually diminished and eventually disappeared. When the patients were first seen, the clinical findings suggested a small ventricular septal defect but no thrill was present and the systolic murmur had a superficial blowing quality with high-frequency vibrations and tended to stop before the second heart sound. Cardiac catheterization demonstrated a small left-to-right shunt at ventricular level in 4 of the patients while the murmur was present; in 1 this was repeated after the murmur had gone and no abnormality could be demonstrated. Cardiac catheterization in other patients with typical disappearing systolic murmurs showed a left-to-right shunt in some but in others this was too small to be detected by routine oxygen studies. A rough correlation was established between the length and intensity of the murmur and the size of the shunt. With angiocardiography and intracardiac phonocardiography the exact site of the ventricu...

Spontaneous Closure of Ventricular Septal Defects

The fate of 57 children who underwent surgical closure of ventricular septal defect in the presence of increased pulmonary vascular resistance was analyzed. Eighteen (32 percent) died at or immediately after operation. Seven late deaths, due to the Eisenmenger syndrome, occurred 1 to 7 years after operation. Follow-up studies, including cardiac catheterization, were performed in 25 survivors, 1 to 11 years (mean 5 years) after operation. In patients operated on after age 2 years, the degree of preoperative elevation of pulmonary vascular resistance largely determined the prognosis: The condition of patients with mild elevation (pulmonary vascular resistance less than one third the systemic level) returned to normal after operation, with one exception. Patients with more severe elevation (pulmonary vascular resistance more than one third the systemic level) most often showed progressive pulmonary vascular disease; the condition of a few remained unchanged and that of only one returned to normal after operation. Operative mortality rate was high in children with elevated pulmonary vascular resistance during the second year of life who were operated on before age 2 years, but pulmonary vascular resistance returned to normal in the three survivors. When pulmonary vascular resistance was increased in the first year of life, it generally decreased spontaneously (independently of operation); the early increase in these cases is believed to represent delayed maturation of the pulmonary vascular bed rather than pulmonary vascular disease. The overall results of surgery in ventricular septal defect associated with a high level of pulmonary vascular resistance are unfavorable and call for interruption of the natural history before significant pulmonary vascular obstructive changes have taken place; this can be achieved by surgical closure before age 2 years or pulmonary artery banding in infancy.

Ventricular septal defect with increased pulmonary vascular resistance: Late results of surgical closure

A review of 108 cases of coarctation of the aorta diagnosed under 1 year of age, and admitted to The Hospital for Sick Children, Toronto, over a 12-year period, is presented. Preductal coarctation accounted for 90% of the fatalities under 1 year. Patency of the ductus arteriosus occurned in 98% of cases in the first 6 months of life. Forty-nine per cent of cases of coarctation of the aorta under 1 year of age have major cardiac anomalies other than patent ductus: ventricular septal defect, 33%; transposition of great vessels, 10%; and atrial septal defect, 6%. Problems in diagnosis occurred when blood pressure readings were equivocal. Operative mortality for coarctation of the aorta in the first year of life was 41%, while after 1 month of age it was only 29%. Mortality in patients not operated on during the first year of life was 50%, while for those less than 1 month of age with symptoms and signs of decompensation and not operated on, the mortality was 87%. In dealing with coarctation of the aorta in the first year of life the following are recommended: 1) When blood pressure readings in the arms and legs are equivocal, the readings should be repeated frequently until the diagnosis is clarified; 2) aortogram should be performed on patients difficult to diagnose; 3) babies presenting with symptoms in the first month of life should be operated on promptly unless they show a dramatic response in a 12-hour trial of treatment with digitalis; 4) babies after 1 month of age who respond to digitalis may be kept on this medication until adequate adjustment in circulatory hemodynamics has taken place and surgery can be performed at the optimum age.

COARCTATION OF THE AORTA IN INFANTS A Review of Twelve Years' Experience

Coarctation of the aorta with special reference to the first year of life.

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