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Left Ventricular Volume Reduction for End-Stage Heart Disease (1999)

Vanelli, Paolo ; Beretta, Luigi ; Fundaro, Pino Maria ; [et al.]

Oxford, UK : Blackwell Publishing Ltd

Journal of cardiac surgery 14 (1999), S. 0

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ISSN: 1540-8191

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Medicine

Notes: Abstract Partial left ventriculectomy (PLV) was recently introduced for end-stage dilated cardiomyopathy to improve ventricular function. Since November 1996 we have performed PLV in 14 patients; preoperatively 4 patients had idiopathic dilated cardiomyopathy and 10 had ischemic dilated cardiomyopathy. 57.1% of patients were in New York Heart Association functional Class IV. The mitral valve was replaced in 11 patients. Postoperative echocardiography showed a reduction of left end-diastolic diameter (55.4 ± 5.4 mm) and an increase in forward ejection (cardiac index from 2.19 ± 0.571 min/m2 to 2.67 ± 0.931/min/m2). The 30-day mortality was 28.6% and 20-month survival was 57.2%. Only one patient was not in NYHA functional class due to postoperative progressive mitral incompetence. Prognostic factors should be identified to avoid early failure. However, even if the mortality rate for PLV high, this operation is a valid choice for the treatment of end-stage dilated cardiomyopathy.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1540-8191.1999.tb00952.x

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Steric influence in the direction of elimination of gas-phase pyrolyses of several highly branched secondary acetates (1984)

Arcila, Carolina ; Pino, Maria ; Lubinkowski, Jacek ; [et al.]

New York, NY : Wiley-Blackwell

International Journal of Chemical Kinetics 16 (1984), S. 57-67

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ISSN: 0538-8066

Keywords: Chemistry ; Physical Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: The rate coefficients for the gas-phase pyrolyses of a series of structurally related secondary acetates have been measured in a static system over the temperature range of 289.1-359.5°C and the pressure range 50.0-203.0 torr. The temperature dependence of the rate coefficients is given by the following Arrhenius equations: for 3-hexyl acetate, log k1 (s-) = (12.12 ± 0.33) - (176.1 ± 3.9)kJ/mol/2.203RT; for 5-methyl-3-hexyl acetate, log k1 (s-) = (13.17 ± 0.20) - (186.2 ± 2.3)kJ/mol/2.303RT; and for 5,5-dimethyl-3-hexyl acetate, log k1 (s-) = (12.70 ± 0.19) - (177.4 ± 2.2)kJ/mol/2.303RT. The direction of elimination of these esters has shown from the invariability of olefin distributions at different temperatures and percentages of decomposition that steric hindrance is a determining factor in the eclipsed cis conformation. Moreover, a more detailed analysis indicates that the greater the alkyl-alkyl interaction, the less favored the elimination tends to be. Otherwise, an increase of alkyl-hydrogen interaction caused steric acceleration to be the determining factor.

Additional Material: 6 Tab.