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Full-Text Articles in Medicine and Health Sciences

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough May 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough

Kevin M Rice

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough Feb 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough

Elsa I. Mangiarua

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough Jan 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough

Eric Blough

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough Jan 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough

Silvestre P. Cansino

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest Walker, Michael Nillas, Elsa Mangiarua, Sylvestre Cansino, Ryan Morrison, Romaine Perdue, William Triest, Gary Wright, Mark Studeny, Paulette Wehner, Kevin Rice, Eric Blough Jan 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest Walker, Michael Nillas, Elsa Mangiarua, Sylvestre Cansino, Ryan Morrison, Romaine Perdue, William Triest, Gary Wright, Mark Studeny, Paulette Wehner, Kevin Rice, Eric Blough

Paulette S. Wehner

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough Jan 2013

Age-Associated Changes In Hearts Of Male Fischer 344/Brown Norway F1 Rats, Ernest M. Walker Jr., Michael S. Nillas, Elsa I. Mangiarua, Sylvestre Cansino, Ryan G. Morrison, Romaine R. Perdue, William E. Triest, Gary L. Wright, Mark Studeny, Paulette Wehner, Kevin M. Rice, Eric R. Blough

Mark A. Studeny

Aging is associated with left ventricular hypertrophy, dilatation, and fibrosis of the heart. The Fischer 344/Brown Norway F1 (F344/BNF1) rat is recommended for age-related studies by the National Institutes on Aging because this hybrid rat lives longer and has a lower rate of pathological conditions than inbred rats. However, little is known about age-associated changes in cardiac and aortic function and structure in this model. This study evaluated age-related cardiac changes in male F344/BNF1 rats using ECHO, gross, and microscopic examinations. Rats aged 6-, 30-, and 36-mo were anesthetized and two-dimensional ECHO measurements, two-dimensional guided M-mode, Doppler M-mode, and other …


Improved Cardiovascular Risk Prediction Using Nonparametric Regression And Electronic Health Record Data, Edward Kennedy, Wyndy Wiitala, Rodney Hayward, Jeremy Sussman Dec 2012

Improved Cardiovascular Risk Prediction Using Nonparametric Regression And Electronic Health Record Data, Edward Kennedy, Wyndy Wiitala, Rodney Hayward, Jeremy Sussman

Edward H. Kennedy

Use of the electronic health record (EHR) is expected to increase rapidly in the near future, yet little research exists on whether analyzing internal EHR data using flexible, adaptive statistical methods could improve clinical risk prediction. Extensive implementation of EHR in the Veterans Health Administration provides an opportunity for exploration. Our objective was to compare the performance of various approaches for predicting risk of cerebrovascular and cardiovascular (CCV) death, using traditional risk predictors versus more comprehensive EHR data. Regression methods outperformed the Framingham risk score, even with the same predictors (AUC increased from 71% to 73% and calibration also improved). …