Search Results - "Steinman, Richard C"

Comparison of spontaneous vs. metronome-guided breathing on assessment of vagal modulation using RR variability by Bloomfield, D M, Magnano, A, Bigger, Jr, J T, Rivadeneira, H, Parides, M, Steinman, R C

“…R-R interval variability (RR variability) is increasingly being used as an index of autonomic activity. High-frequency (HF) power reflects vagal modulation of…”
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Microvolt T-Wave Alternans and the Risk of Death or Sustained Ventricular Arrhythmias in Patients With Left Ventricular Dysfunction by Bloomfield, Daniel M., Bigger, J. Thomas, Steinman, Richard C., Namerow, Pearila B., Parides, Michael K., Curtis, Anne B., Kaufman, Elizabeth S., Davidenko, Jorge M., Shinn, Timothy S., Fontaine, John M.

“…Microvolt T-Wave Alternans and the Risk of Death or Sustained Ventricular Arrhythmias in Patients With Left Ventricular Dysfunction Daniel M. Bloomfield, J…”
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Microvolt T-wave alternans distinguishes between patients likely and patients not likely to benefit from implanted cardiac defibrillator therapy: A solution to the multicenter automatic defibrillator implantation trial (MADIT) II conundrum by BLOOMFIELD, Daniel M, STEINMAN, Richard C, RUSSO, Andrea, CHUEN TANG, BIGGER, J. Thomas, NAMEROW, Pearila B, PARIDES, Michael, DAVIDENKO, Jorge, KAUFMAN, Elizabeth S, SHINN, Timothy, CURTIS, Anne, FONTAINE, John, HOLMES, Douglas

“…In 2003, the Centers for Medicaid and Medicare Services recommended QRS duration as a means to identify MADIT II-like patients suitable for implanted cardiac…”
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From expert-derived user needs to user-perceived ease of use and usefulness: A two-phase mixed-methods evaluation framework by Boland, Mary Regina, Rusanov, Alexander, So, Yat, Lopez-Jimenez, Carlos, Busacca, Linda, Steinman, Richard C., Bakken, Suzanne, Bigger, J. Thomas, Weng, Chunhua

“…[Display omitted] •This framework leverages the complementarity of usability experts and end-users.•Mixed-methods allow comprehensive data collection and…”
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“Indeterminate” Microvolt T-Wave Alternans Tests Predict High Risk of Death or Sustained Ventricular Arrhythmias in Patients With Left Ventricular Dysfunction by Kaufman, Elizabeth S., Bloomfield, Daniel M., Steinman, Richard C., Namerow, Pearila B., Costantini, Ottorino, Cohen, Richard J., Bigger, J. Thomas

“…“Indeterminate” Microvolt T-Wave Alternans Tests Predict High Risk of Death or Sustained Ventricular Arrhythmias in Patients With Left Ventricular Dysfunction…”
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An Integrated Model for Patient Care and Clinical Trials (IMPACT) to support clinical research visit scheduling workflow for future learning health systems by Weng, Chunhua, Li, Yu, Berhe, Solomon, Boland, Mary Regina, Gao, Junfeng, Hruby, Gregory W., Steinman, Richard C., Lopez-Jimenez, Carlos, Busacca, Linda, Hripcsak, George, Bakken, Suzanne, Bigger, J. Thomas

“…[Display omitted] •We created software Integrated Model for Patient Care and Clinical Trials (IMPACT).•IMPACT coordinates clinical research visits with patient…”
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Power law behavior of RR-interval variability in healthy middle-aged persons, patients with recent acute myocardial infarction, and patients with heart transplants by Bigger, J. T. Jr, Steinman, R. C., Rolnitzky, L. M., Fleiss, J. L., Albrecht, P., Cohen, R. J.

“…BACKGROUND. The purposes of the present study were (1) to establish normal values for the regression of log(power) on log(frequency) for, RR-interval…”
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RR variability in healthy, middle-aged persons compared with patients with chronic coronary heart disease or recent acute myocardial infarction by BIGGER, J. T, FLEISS, J. L, STEINMAN, R. C, ROLNITZKY, L. M, SCHNEIDER, W. J, STEIN, P. K

“…The purpose of this investigation was to establish normal values of RR variability for middle-aged persons and compare them with values found in patients early…”
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Mechanisms of death in the CABG Patch Trial : A randomized Trial of implantable cardiac Defibrillator prophylaxis in patients at high risk of death after coronary artery bypass graft surgery by BIGGER, J. T, WHANG, W, ROTTMAN, J. N, KLEIGER, R. E, GOTTLIEB, C. D, NAMEROW, P. B, STEINMAN, R. C, ESTES, N. A. M. III

“…The CABG Patch trial compared prophylactic implantable cardiac-defibrillator (ICD) implantation with no antiarrhythmic therapy in coronary bypass surgery…”
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Frequency domain measures of heart period variability to assess risk late after myocardial infarction by Bigger, J.Thomas, Fleiss, Joseph L., Rolnitzky, Linda M., Steinman, Richard C.

“…Objectives. To determine whether spectral measures of heart period (RR) variability predict death when measured late after infarction, we studied patients in…”
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Correlations among time and frequency domain measures of heart period variability two weeks after acute myocardial infarction by Bigger, J.Thomas, Fleiss, Joseph L., Steinman, Richard C., Rolnitzky, Linda M., Kleiger, Robert E., Rottman, Jeffrey N.

“…Seven hundred fifteen participants from a multicenter natural history study of acute myocardial infarction were studied (1) to determine the correlations among…”
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Comparison of 24-hour parasympathetic activity in endurance-trained and untrained young men by Goldsmith, Rochelle L., Bigger, J.Thomas, Steinman, Richard C., Fleiss, Joseph L.

“…Objectives. This study compares 24-h parasympathetic activity in aerobically trained and untrained healthy young men. Background. Higher values of…”
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Physical fitness as a determinant of vagal modulation by GOLDSMITH, R. L, BIGGER, J. T, BLOOMFIELD, D. M, STEINMAN, R. C

“…The association between increasing age and decreasing vagal modulation is well known. However, the importance of fitness as a determinant of the decline in…”
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Cardiac autonomic control and hostility in healthy subjects by Sloan, Richard P., Shapiro, Peter A., Bigger, J. Thomas, Bagiella, Emilia, Steinman, Richard C, Gorman, Jack M.

“…Disordered autonomic regulation of the cardiovascular system has been implicated in sudden cardiac death and coronary artery disease in numerous studies…”
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Long-term carvedilol therapy increases parasympathetic nervous system activity in chronic congestive heart failure by Goldsmith, Rochelle L., Bigger, J.Thomas, Bloomfield, Daniel M., Krum, Henry, Steinman, Richard C., Sackner-Bernstein, Jonathan, Packer, Milton

“…Treatment with carvedilol produced striking increases in parasympathetic nervous system activity in patients with moderate to severe CHF. This effect of…”
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Time course of recovery of heart period variability after myocardial infarction by Bigger, J.Thomas, Fleiss, Joseph L., Rolnitzky, Linda M., Steinman, Richard C., Schneider, William J.

“…Four components of the heart period power spectrum—ultra low frequency (<0.0033 Hz), very low frequency (0.0033 to <0.04 Hz), low frequency (0.04 to <0.15 Hz)…”
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Effect of atenolol and diltiazem on heart period variability in normal persons by Cook, James R., Thomas Bigger, J., Kleiger, Robert E., Fleiss, Joseph L., Steinman, Richard C., Rolnitzky, Linda M.

“…Several time and frequency domain measures of heart period variability are reduced 1 to 2 weeks after myocardial infarction, and a reduced standard deviation…”
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Components of heart rate variability measured during healing of acute myocardial infarction by Bigger, J.Thomas, Kleiger, Robert E., Fleiss, Joseph L., Rolnitzky, Linda M., Steinman, Richard C., Miller, J.Philip

“…A high degree of heart rate (HR) variability is found in persons with normal hearts, whereas low HR variability can be found in patients with severe coronary…”
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Efficient estimation of the heart period power spectrum suitable for physiologic or pharmacologic studies by Rottman, Jeffrey N., Steinman, Richard C., Albrecht, Paul, Bigger, J.Thomas, Rolnitzky, Linda M., Fleiss, Joseph L.

“…The standard deviation of the normal RR intervals (SDNN) computed over 24 hours predicts mortality after myocardial infarction. 1 The power spectrum of heart…”
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Comparison of baroreflex sensitivity and heart period variability after myocardial infarction by Bigger, J.Thomas, La Rovere, Maria Teresa, Steinman, Richard C., Fleiss, Joseph L., Rottman, Jeffrey N., Rolnitzky, Linda M., Schwartz, Peter J.

“…In animals, baroreflex sensitivity is inversely related to the likelihood of ventricular fibrillation during myocardial ischemia. After myocardial infarction…”
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