PubMed Health⌕ Search

Biomedical subjects

Matthew J Ritter

Publications and source records attributed to Matthew J Ritter.

5 recordsLinked to original sources
PubMed2006

Outcomes of cardiopulmonary resuscitation and predictors of survival in patients undergoing coronary angiography including percutaneous coronary interventions.

We studied the outcome of cardiopulmonary resuscitation (CPR) in patients undergoing coronary angiography (CA) and/or percutaneous coronary interventions (PCI). Of 51,985 CA and PCI patients treated between January 1, 1990, and December 31, 2000, 114 required CPR. Records were reviewed for relationships between patient characteristics and various procedures and short-term survival. Long-term survival was compared with that of a matched cohort of patients who did not have an arrest during catheterization and a matched cohort from the general Minnesota population. Over the 11-year period, the overall incidence of CPR was 21.9 per 10,000 procedures. This rate decreased from 33.9 per 10,000 before 1995 to 13.1 per 10,000 after 1995. Overall survival to hospital discharge after CPR was 56.1%. Survival to discharge was less frequent with a history of congestive heart failure, previous coronary artery bypass graft surgery, hemodynamic instability during the procedure, and with prolonged or emergent catheterizations. Pulseless electrical activity (versus asystole or ventricular fibrillation) indicated very poor short-term survival. Interestingly, short-term survival was not related to the extent of coronary artery disease. Long-term survival of patients who survived cardiac arrest was comparable to that of those who did not have arrest during catheterization. In conclusion, the incidence of periprocedural CPR during diagnostic or interventional coronary procedures decreased after 1995. Patients who received CPR in the cardiac catheterization lab have a remarkably frequent survival to hospital discharge rate. Long-term survival of these patients is only minimally reduced.

Aged↗
PubMed2004

Distribution of vertical forces in the pads of Greyhounds and Labrador Retrievers during walking.

OBJECTIVE: To document peak vertical force (PVF) and vertical impulse (VI) in the pads of Greyhounds and Labrador Retrievers. ANIMALS: 8 Greyhounds and 8 Labrador Retrievers. PROCEDURE: Velocity and acceleration were restricted to ranges of 0.9 to 1.1 m/s and -0.1 to 0.1 m/s2, respectively. The PVF and VI measurements were collected from digital pad (DP)-2, -3, -4, and -5 and the metacarpal pad (McP) or metatarsal pad (MtP) of each limb in each dog. RESULTS: We found no significant differences between the left and right forelimbs or hind limbs for any pad in either breed. Vertical forces in the forelimb were always greater than those in the hind limb. The PVF in the forelimbs of Greyhounds was greatest in DP-3, -4, and -5 and DP-3, DP-4, and the MtP in the hind limbs. The VI in Greyhound forelimbs was greatest in DP-3, -4, and -5 but greatest in DP-4 in the hind limbs. The PVF in the forelimbs of Labrador Retrievers was greatest in the McP, whereas in the hind limbs it was greatest in DP-4. The VI in Labrador Retriever forelimbs was greatest in DP-3, DP-4, and the McP but greatest in DP-3 and -4 in the hind limbs. Significant differences were detected in load distribution between the breeds. CONCLUSIONS AND CLINICAL RELEVANCE: This study confirms that DP-3 and DP-4 are major weight-bearing pads in dogs. However, loads were fairly evenly distributed, and DP-5 and the McP or MtP bear a substantial amount of load in both breeds.

Animals↗
PubMed2003

Ondansetron-induced multifocal encephalopathy.

We treated a patient who developed transient multifocal encephalopathy with extrapyramidal symptoms (oromandibular dystonia, oculogyric crisis, and limb dystonia) in temporal proximity to ondansetron administration on emergence from general anesthesia. No other medications known to cause extrapyramidal reactions were administered. Although these symptoms resolved fully, the presentation was dramatic and resembled the symptoms of structural brain injury. Ondansetron is used frequently as an antiemetic agent in many clinical settings and is not limited to surgical patients. Therefore, the entire medical community should be cognizant of this potential adverse reaction.

Antiemetics↗
PubMedDate not supplied

The relationship between limb function and radiographic osteoarthrosis in dogs with stifle osteoarthrosis.

OBJECTIVE: To evaluate the relationship between limb function and radiographic evidence of stifle osteoarthrosis (OA) in dogs. STUDY DESIGN: The relationship between force platform data and radiographic OA score was evaluated on 2 separate days using regression analysis. Interday variation was also assessed. ANIMALS: Forty-one dogs with visible lameness and radiographic evidence of stifle OA. METHODS: Force platform data were collected at a velocity of 1.7 to 2.0 m/s for 5 trials on day 1 and day 8. Radiographs taken on day 1 were scored using a previously reported OA scoring system. RESULTS: No significant relationship was found between force platform data and OA score. No significant differences were found between any day 1 and day 8 force platform values. CONCLUSIONS: Although radiographic evidence of stifle OA provides evidence of pathology, it does a poor job of representing limb function. In addition, the absence of significant differences between day 1 and day 8 values in this population of dogs supports use of only a single force platform evaluation before measuring a treatment effect. CLINICAL RELEVANCE: The presence of OA in the stifle joint does not correlate with clinical function; radiographic outcome should be used cautiously as a predictor of clinical outcome.

Animals↗