Estimated preejection period (PEP) based on the detection of the R-wave and dZ/dt-min peaks does not adequately reflect the actual PEP across a wide range of laboratory and ambulatory conditions.

[1]  A. Weissler,et al.  Effects of adrenergic receptor activation and blockade on the systolic preejection period, heart rate, and arterial pressure in man. , 1967, The Journal of clinical investigation.

[2]  P E Leaverton,et al.  The First Derivative Thoracic Impedance Cardiogram , 1970, Circulation.

[3]  D L Eckberg,et al.  Defective cardiac parasympathetic control in patients with heart disease. , 1971, The New England journal of medicine.

[4]  D B Newlin,et al.  Pre-ejection period: measuring beta-adrenergic influences upon the heart. , 1979, Psychophysiology.

[5]  B. Wallin,et al.  Plasma noradrenaline correlates to sympathetic muscle nerve activity in normotensive man. , 1981, Acta physiologica Scandinavica.

[6]  A. Goldberger,et al.  Effect of exercise on QRS duration in healthy men: a computer ECG analysis. , 1983, Journal of applied physiology: respiratory, environmental and exercise physiology.

[7]  Cardiorespiratory dynamics during sinusoidal and impulse exercise in man. , 1983, The Japanese journal of physiology.

[8]  M. Allen,et al.  Evaluation of beta-adrenergic influences on cardiovascular and metabolic adjustments to physical and psychological stress. , 1986, Psychophysiology.

[9]  P. Hjemdahl,et al.  Altered cardiovascular responsiveness to adrenaline in endurance-trained subjects. , 1986, Acta physiologica Scandinavica.

[10]  J. Miller,et al.  Decreased heart rate variability and its association with increased mortality after acute myocardial infarction. , 1987, The American journal of cardiology.

[11]  W. Anderson,et al.  Assessment of human sympathetic nervous system activity from measurements of norepinephrine turnover. , 1988, Hypertension.

[12]  P. Raven,et al.  Exercise training bradycardia: the role of autonomic balance. , 1989, Medicine and science in sports and exercise.

[13]  J. Fahrenberg,et al.  Methodological guidelines for impedance cardiography. , 1990, Psychophysiology.

[14]  G. Jennings,et al.  Increased regional sympathetic nervous activity in human hypertension: causes and consequences. , 1990, Journal of hypertension. Supplement : official journal of the International Society of Hypertension.

[15]  P. Hjemdahl,et al.  Altered cardiovascular responsiveness to adrenoceptor agonists in endurance-trained men. , 1991, Journal of applied physiology.

[16]  S Capewell,et al.  Decreased cardiac parasympathetic activity in chronic heart failure and its relation to left ventricular function. , 1992, British heart journal.

[17]  P. Schwartz,et al.  Autonomic nervous system and sudden cardiac death. Experimental basis and clinical observations for post-myocardial infarction risk stratification. , 1992, Circulation.

[18]  R. Vandongen,et al.  Genetic influences on plasma catecholamines in human twins. , 1993, The Journal of clinical endocrinology and metabolism.

[19]  J. Cacioppo,et al.  Autonomic cardiac control. III. Psychological stress and cardiac response in autonomic space as revealed by pharmacological blockades. , 1994, Psychophysiology.

[20]  H. Rüddel,et al.  Reduced parasympathetic cardiac control in patients with hypertension at rest and under mental stress. , 1994, American heart journal.

[21]  G. Willemsen,et al.  Ambulatory measurement of respiratory sinus arrhythmia and respiration rate , 1995, Biological Psychology.

[22]  G. Willemsen,et al.  Ambulatory monitoring of the impedance cardiogram. , 1996, Psychophysiology.

[23]  R. Prescott,et al.  Prospective study of heart rate variability and mortality in chronic heart failure: results of the United Kingdom heart failure evaluation and assessment of risk trial (UK-heart). , 1998, Circulation.

[24]  C. Ring,et al.  Secretory immunoglobulin A and cardiovascular reactions to mental arithmetic, cold pressor, and exercise: effects of beta-adrenergic blockade. , 1999, Psychophysiology.

[25]  E. Katkin,et al.  The effects of epinephrine administration on impedance cardiographic measures of cardiovascular function. , 1999, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[26]  R. Nelesen,et al.  Impedance cardiography-derived hemodynamic responses during baroreceptor testing with amyl nitrite and phenylephrine: a validity and reliability study. , 1999, Psychophysiology.

[27]  M. Esler,et al.  Sympathetic nervous system activation in essential hypertension, cardiac failure and psychosomatic heart disease. , 2000, Journal of cardiovascular pharmacology.

[28]  K. Nazar,et al.  Cardiovascular, metabolic and plasma catecholamine responses to passive and active exercises. , 2000, Journal of physiology and pharmacology : an official journal of the Polish Physiological Society.

[29]  Hartmut Schächinger,et al.  Cardiovascular Indices of Peripheral and Central Sympathetic Activation , 2001, Psychosomatic medicine.

[30]  G. Willemsen,et al.  Large-scale ensemble averaging of ambulatory impedance cardiograms , 2003, Behavior research methods, instruments, & computers : a journal of the Psychonomic Society, Inc.

[31]  Pekka Raatikainen,et al.  Prediction of sudden cardiac death after myocardial infarction in the beta-blocking era. , 2003, Journal of the American College of Cardiology.

[32]  E. D. de Geus,et al.  Overcommitment to Work Is Associated With Changes in Cardiac Sympathetic Regulation , 2004, Psychosomatic Medicine.

[33]  B. Wallin,et al.  The effect of carotid sinus nerve stimulation on muscle and skin nerve sympathetic activity in man , 1975, Pflügers Archiv.

[34]  Gary G Berntson,et al.  Where to Q in PEP. , 2004, Psychophysiology.

[35]  S. Julius,et al.  Elevated Heart Rate: A Major Risk Factor for Cardiovascular Disease , 2004, Clinical and experimental hypertension.

[36]  E. J. Geus,et al.  Effects of variation in posture and respiration on RSA and pre-ejection period. , 2005, Psychophysiology.

[37]  G. Miller,et al.  Applying Mixed Regression Models to the Analysis of Repeated-Measures Data in Psychosomatic Medicine , 2006, Psychosomatic medicine.

[38]  G. Willemsen,et al.  Heritability of Indices for Cardiac Contractility in Ambulatory Recordings , 2006, Journal of cardiovascular electrophysiology.

[39]  Dorret I. Boomsma,et al.  Temporal stability of ambulatory stroke volume and cardiac output measured by impedance cardiography , 2006, Biological Psychology.

[40]  H. Berendse,et al.  Using time interval parameters from impedance cardiography to evaluate autonomic nervous function in Parkinson’s disease , 2007 .

[41]  G. Berntson,et al.  Where to B in dZ/dt. , 2007, Psychophysiology.

[42]  H. Berendse,et al.  Method to measure autonomic control of cardiac function using time interval parameters from impedance cardiography , 2008, Physiological measurement.

[43]  Caroline E. Wright,et al.  Circulating Leptin and Stress‐induced Cardiovascular Activity in Humans , 2008, Obesity.

[44]  Michael Richter,et al.  The heart contracts to reward: monetary incentives and preejection period. , 2009, Psychophysiology.

[45]  T. Lehner,et al.  The Netherlands Twin Register Biobank: A Resource for Genetic Epidemiological Studies , 2010, Twin Research and Human Genetics.

[46]  Rudolf M. Verdaasdonk,et al.  Assessing cardiac preload by the Initial Systolic Time Interval obtained from impedance cardiography , 2010 .

[47]  Robert S. Stawski,et al.  Multilevel Analysis: An Introduction to Basic and Advanced Multilevel Modeling (2nd Edition) , 2013 .