[Electrocardiographic data suggesting anteroseptal myocardial infarction, in presence of infarction of the left ventricle].

We present a case of right ventricular myocardial infarction, secondary to postangioplasty occlusion of ventricular ramus of the right coronary artery, that developed electrocardiographic changes suggestive of septal myocardial infarction, this diagnosis was eliminated through angiographic study. We conclude that the carefully analysis of the electrocardiographic changes in ST segment in V1 to V4 can guide to the diagnosis of right ventricular myocardial infarction. For that reason we recommend the routinary register of the right electrocardiographic derivations as V3R and V4R, and left derivations V7 and V8, that is, the thoracic circle, in all patients with acute myocardial infarction regardless its location.

[Peripheral and coronary angioscopy: its correlation with endovascular procedures].

The efficacy of any method of transluminal angioplasty has been evaluated with angiography, this can show the major anatomic results. Angioscopy can detect by direct observation, the induced changes in the vessel wall morphology after the recanalization method. We studied 5 coronary arteries and 9 peripheral arteries with total occlusion in 7, and the other 7 with more than 75% of obstruction.

[Doppler echocardiography assessment of tricuspid valve prosthesis with normal function and with dysfunction due to obstruction].

Unlabelled: In order to know the normal ranges of the maximum velocity and the pressure half-time between normal functioning tricuspid prostheses and malfunctioning tricuspid prostheses due to obstruction, we studied 25 patients with tricuspid prostheses (11 mechanical and 14 biological); they were divided in 2 groups: group I: 14 patients without clinical evidence of malfunction and; group II: 11 patients with malfunction due to obstruction confirmed by catheterization, surgery and/or necropsy. The peak gradient was estimated by the modified Bernoulli equation and the prosthetic valve area by the pressure halftime method.

Results: the mean peak velocity in group I was 147 +/- 18 cm/sec versus 165 +/- 16 cm/sec (p NS) in group II.

Percutaneous transluminal ultrasonic angioplasty: preliminary clinical report of ultrasound plaque ablation in totally occluded peripheral arteries.

Peripheral arterial obstructive disease has been treated with ultrasound ablation. Thirty two patients (pts), mean age 67 +/- 10 years underwent angiosonoplasty, with a prototype ultrasonic system, due to severe claudication (31%), rest pain (44%), rest pain and ulceration (25%). Angiosonoplasty was successful in 26/32 (81%) stenoses, (1/2 iliac, 9/2 femorals, 11/12 popliteal, 5/6 tibial).

[In vitro effects of argon laser radiation the human healthy and atherosclerotic aorta].

Argon laser exposures in vitro were done on human aortas. The laser energy applied on a fresh aorta section (A) was from 100mw to 1000mw. A second aorta section (B), formalin fixed, was irradiated under saline solution by a fiberoptic system.

[Simplified method for the early detection of post potentials in patients with acute myocardial infarct].

The risk of suddenly presenting ventricular tachyarrhythmias or death was analyzed in a prospective way in 71 patients with acute myocardial infarction and in 21 patients without any apparent cardiopathy. The average surface signal was measured when the patient was admitted in the hospital and on the following days of the acute phase of the infarction. Holter 24 hours monitoring and determination of the ejection fraction with radionuclide angiocardiography were also performed.

[Transluminal coronary angioplasty using ultrasound].

The application of ultrasonic energy for ablation of atherosclerotic plaques was studied. This study was performed in 92 segments obtained from human coronary arteries which belonged to eleven hearts obtained from patients who have died from acute myocardial infarction. An ultrasound generating system (Cavitron 600) was used, and an ultrasonic probe wire (P-150 Endosonic), was attached to it.

[Electric cardioversion in the emergency service. Experience in 1000 cases].

We describe our experience with 1000 electric cardioversions performed at the emergency ward in the Hospital of Cardiology y Neumology, National Medical Center I.M.S.