A. Castellanos
University of Havana
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by A. Castellanos.
American Heart Journal | 1958
A. Castellanos; Luis Azan; JoséM. Calviño
Abstract Dissociation with interference occurred between pacemakers located, one at the uppermost region of the A-V junction, and the other, either above or below the bifurcation of the common bundle. A prolonged A-V conduction time of interference beats permitted the assumption that some degree of A-V block accompanied this form of dissociation. When both foci discharged at a high enough rate (over 70), it was then possible to make the diagnosis of simultaneous, independent, coexisting A-V tachycardias, a form of double tachycardia not previously described. In some records of Case 1, occasional stimuli which had their origin in the uppermost pacemaker were stopped at different levels of the auriculoventricular conduction system; the effect of this was revealed only by the unexpected failure of the succeeding beat from the same pacemaker to appear. The varying extent of penetration depended on diverse causes, which were discussed and analyzed. This physiologic phenomenon, known as concealed conduction, had been described by Langendorf, and is observed when dealing with normal as well as with depressed conductivity. The most important consideration from the clinical standpoint was the production of the arrhythmia by digitalis toxicity in old persons with arteriosclerotic heart disease and congestive heart failure. Prompt withdrawal of the drug is emphasized.
American Heart Journal | 1957
J. M. Calvino; Luis Azan; A. Castellanos
Abstract The presence of 2:1 exit block was definitely established in 2 patients, one with an atrial, and the other with a ventricular tachycardia. Since this phenomenon is a property of automatic rhythms, both paroxysms were ascribed to focal impulse formation. Nevertheless, this mechanism is not to be attributed to all ectopic rhythms.
Archive | 1955
J. Manuel Calvino; L. Azan Cano; A. Castellanos
Archive | 1957
A. Castellanos; L. Azan Cano; J. M. Calvino; N. Taquechel
Revista cubana de cardiología | 1955
A. Castellanos; L. Azan Cano; J. M. Calvino; N. Taquechel
Archive | 1958
L. Azan Cano; A. Castellanos; J. M. Calvino
Revista cubana de cardiología | 1958
R. Ugarriza; L. Azan Cano; A. Castellanos
Archive | 1958
A. De Cardenas; J. Fermin Corral; L. Azan; A. Castellanos
Revista cubana de cardiología | 1957
A. De Cardenas; R. Ugarriza; L. Azan Cano; A. Castellanos
Archive | 1957
J. M. Calvino; L. Azan Cano; A. Castellanos