[Interventricular communication with infundibular reaction (author's transl)]. / Comunicación interventricular con reacción infundibular.

Ten patients exhibiting an interventricular communication and an infundibular reaction are presented. As a key premise for selection of cases, an angiohemodynamic study and presence of a gradient at an infundibular level above 25 mm. Hg. were required. Clinic characteristics as well as electrocardiogram, radiology and angiohemodynamic study of all patients are commented. Incidence in different studies, as well as in our own, is discussed, which was found to be of 9%. Similarly, diagnosis of evolutive form of interventricular communication and evolutive character in question is commented; four cases of their own are provided. The various explanatory theories of infundibular stenosis are commented.

[Pulmonary atresia with intact ventricular septum (author's transl)]. / Obstrucción severa del tracto de salida del ventrículo derecho. I. Atresia pulmonar con "septum" interventricular íntegro.

Ten cases of pulmonary atresia with intact ventricular septum are presented. The groups in which these patients are classified are described, thinking that the mentioned classification is a simplification of the problem. After discussion of the dates apported by clinic, thorax X-Rays and electrocardiogram, authors come to the conclusion that they are not specific of this cardiopathy. Contribution of hemodinamic and angiocardiographic characteristics, paying special attention to the blood flow to lung vascular tree and in existance of intramyocardium sinusoid are shown. Description of the general tendencies of the most accepted surgical techniques in bibliography for resolution of both groups of patients is made.

[Critical pulmonary stenosis in infants (author's transl)]. / Obstrucción severa del tracto de salida del ventrículo derecho.

Eighteen infants carrying pulmonary stenosis with a complete interventricular wall whose most frequent clinical data are: precocius cyanosis, congestive cardiac insufficiency and in 25% of them hypoxic crises are presented. Complementary explorations of this entity are not definitive, but clinical diagnosis described with evolutional cardiomegaly at the expense of the right cavities and pulmonary ischemia forces authors to think that there is a severe obstruction of the infumdibulum with complete interventricular septum. The different parameters which have been proposed to evaluate severity of the stenosis are discussed and compared, finding among them significative differences. Authors consider the concept of the right diminutive ventricle, finding in these cases the electrocardiographic pattern rS in V1 and observing a great mortality both spontaneous and postsurgical. The high mortality of this heart disease, both in its' natural evolution as well as after surgery is to be pointed out as in most published series.