Forebrain regulation of cardiac function spectral and dimensional analysis of RR and QT intervals

1993 ◽  
Vol 28 (4) ◽  
pp. 331-342 ◽  
Author(s):  
Radu Negoescu ◽  
James E. Skinner ◽  
Stewart Wolf
Keyword(s):  
Cardiac Function ◽  
Dimensional Analysis ◽  
Qt Intervals

scholarly journals Changes in Evoked QT Intervals According to Variations in Atrioventricular Delay and Cardiac Function in Patients With Implanted QT-Driven DDDR Pacemakers

2003 ◽  
Vol 67 (6) ◽  
pp. 515-518 ◽  
Author(s):  
Toshiyuki Ishikawa ◽  
Teruyasu Sugano ◽  
Shinichi Sumita ◽  
Masami Kosuge ◽  
Izumi Kobayashi ◽  
...  
Keyword(s):  
Cardiac Function ◽  
Atrioventricular Delay ◽  
Qt Intervals

A two-dimensional analysis of regional myocardial function in the dog

1983 ◽  
Vol 61 (8) ◽  
pp. 920-926 ◽  
Author(s):  
Hideo Nomura ◽  
Kazuhiko Nagata ◽  
Yoshihiro Futamura ◽  
Yoshiyuki Hama ◽  
Iwao Sotobata
Keyword(s):  
Cardiac Function ◽  
Surface Area ◽  
Dimensional Analysis ◽  
Myocardial Function ◽  
Left Ventricular ◽  
Segment Length ◽  
Myocardial Segment ◽  
Two Dimensional ◽  
Ventricular Contraction ◽  
Regional Myocardial Function

The pattern of left ventricular contraction or relaxation is not uniform and also changes depending on hemodynamic states. Accordingly, the measurement of myocardial segment length only may have limitations for the analysis of regional myocardial function, and a two-dimensional analysis of regional myocardial function was developed and characterized by utilizing measurement of regional myocardial surface area on the epicardial surface. In eight anesthetized open-chest dogs, the relationship between regional myocardial function and total cardiac function was examined. The extent of the reduction of regional myocardial surface area during the ejection phase or during the systolic phase correlated more closely with stroke volume over wide ranges of left ventricular end-diastolic pressure, aortic pressure, left ventricular contractility, and heart rate (r = 0.75–0.96) than the shortening of myocardial segment length alone. Thus, the results demonstrated that regional myocardial function estimated by the measurement of regional myocardial surface area represents total cardiac function more accurately than myocardial segment length over wide ranges of hemodynamic states despite the changes in the left ventricular contraction and relaxation pattern.

Sudden cardiac death and polymorphous ventricular tachycardia in pationts with normal QT intervals and normal systolic cardiac function

1995 ◽  
Vol 75 (10) ◽  
pp. 687-692 ◽  
Author(s):  
Susan J. Eisenberg ◽  
Melvin M. Scheinman ◽  
Navneet K. Duller ◽  
Walter E. Finkbeiner ◽  
Jerry C. Griffin ◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Sudden Cardiac Death ◽  
Cardiac Function ◽  
Cardiac Death ◽  
Qt Intervals ◽  
Polymorphous Ventricular Tachycardia

In situ investigation of the primary recrystallization of alpha titanium in HVEM

1978 ◽  
Vol 36 (1) ◽  
pp. 634-635
Author(s):  
S. Naka ◽  
R. Penelle ◽  
R. Valle
Keyword(s):  
Dimensional Analysis ◽  
Texture Evolution ◽  
Cold Work ◽  
Three Dimensional ◽  
Primary Recrystallization ◽  
Thin Foils ◽  
In Situ Investigation ◽  
Grain Growth Model ◽  
Alpha Titanium

The in situ experimentation technique in HVEM seems to be particularly suitable to clarify the processes involved in recrystallization. The material under investigation was unidirectionally cold-rolled titanium of commercial purity. The problem was approached in two different ways. The three-dimensional analysis of textures was used to describe the texture evolution during the primary recrystallization. Observations of bulk-annealed specimens or thin foils annealed in the microscope were also made in order to provide information concerning the mechanisms involved in the formation of new grains. In contrast to the already published work on titanium, this investigation takes into consideration different values of the cold-work ratio, the temperature and the annealing time.Two different models are commonly used to explain the recrystallization textures i.e. the selective grain growth model (Beck) or the oriented nucleation model (Burgers). The three-dimensional analysis of both the rolling and recrystallization textures was performed to identify the mechanismsl involved in the recrystallization of titanium.

551 Bromocriptine prevents deterioration of cardiac function in patients with PPCM after subsequent pregnancy

2006 ◽  
Vol 5 (1) ◽  
pp. 122-123
Author(s):  
O FORSTER ◽  
D HILFIKERKLEINER ◽  
A YIP ◽  
A BECKER ◽  
M NEL ◽  
...  
Keyword(s):  
Cardiac Function ◽  
Subsequent Pregnancy
Sign in / Sign up

Export Citation Format

Share Document