Search PubMed⌕ Search

Biomedical subjects

R E Quintal

Publications and source records attributed to R E Quintal.

6 recordsLinked to original sources
PubMed2000

Successful conservative treatment of an infected central venous stent.

Several cases of stent infection have been reported in the medical literature. Most required surgical removal of the stent, sometimes with severe sequelae including limb loss. We report the case of a 39-year-old hemodialysis patient who, 3 weeks prior to admission, had undergone angioplasty of the right innominate and subclavian veins with implantation of a Wallstent. He was admitted to the hospital with sepsis due to Staphylococcus aureus and had histological evidence of endovascular infection within the stent. The patient was successfully treated with a 6-week course of intravenous antibiotics delivered directly into the stent, thus avoiding the need for surgical removal of the device.

Adult↗
PubMed2000

Percutaneous recanalization of thrombosed dialysis shunts.

Clotted hemodialysis shunts are a frequent and costly complication encountered in end-stage renal patients undergoing hemodialysis. Treatment strategy is rapidly shifting from surgical thrombectomy to percutaneous recanalization because of the ready availability of the latter technique as well as increased patient comfort. We looked at 99 episodes of thrombosis in hemodialysis shunts, 33 in natural fistulae, treated with several percutaneous techniques of recanalization, all with similar and high success rates, regardless of whether thrombolytics were administered or not.

Angioplasty↗
PubMed1999

Right ventricular infarction complicating right coronary angioplasty.

We report a patient who developed anterior ST segment elevation following angioplasty of the right coronary artery in which a right ventricular branch became occluded. Several similar reports were found in the literature as well as a putative mechanism for the electrocardiographic changes. Cathet. Cardiovasc. Intervent. 47:327-330, 1999.

Aged↗
PubMed1987

Pseudohysteresis in a universal AV sequential pacemaker.

We describe pacemaker pauses and pseudohysteresis resulting from sensing of retrograde P waves in a patient with an implanted AV sequential universal pacemaker. Although retrograde P waves are usually followed by a ventricular spike and therefore create the possibility for "endless loop tachycardia," in our patient some retrograde P waves which followed premature ventricular contractions or junctional beats produced pacemaker pauses. The reason for the occurrence of this phenomenon is that the sum of the VA conduction time and the AV delay is shorter than the pacemaker's hardware rate limit. Therefore, the ventricular spike that should follow the retrograde P wave is inhibited. In the pacemaker used by us, the atrial refractory period is only initiated by an atrial event, allowing the pacemaker to sense retrograde P waves occurring after premature junctional or ventricular depolarizations. Although no therapy is needed for the phenomenon described, it is important to understand its true significance and to avoid unnecessary surgical procedures.

Aged↗
PubMed1977

Feeding preferences of Triatoma dimidiata maculipennis in Yucatan, Mexico.

To determine whether a low preference for human blood by Triatoma dimidiata maculipennis Stal, 1859, the only known vector of Chagas' disease in Yucatan, Mexico, would account for the low prevalence of antibodies to Trypanosoma cruzi in man in the area, the intestinal contents of 924 bugs were tested against antisera to blood antigens of chicken, opossum, dog, bat, monkey, pig, goat, rabbit, horse, human, rat, ox, cat, and armadillo. Although the chicken was the primary host, man was fed upon frequently; thus, the hypothesis was rejected. Other explanations must be found for the relative lack of antibodies against T. cruzi in humans in Yucatan.

Animals↗