Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\25081417
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Auton+Neurosci
2014 ; 184
(ä): 24-6
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Pathophysiology of neurally mediated syncope: Role of cardiac output and total
peripheral resistance
#MMPMID25081417
Fu Q
; Levine BD
Auton Neurosci
2014[Sep]; 184
(ä): 24-6
PMID25081417
show ga
Syncope is a common clinical condition occurring even in otherwise healthy people
without underlying cardiovascular disease. Neurally mediated syncope is by far
the most common cause of syncope in individuals without any structural heart
disease. Based on traditional wisdom, loss of sympathetic tone with relaxation of
vascular smooth muscle is the key mechanism underlying the pathophysiology of
syncope, especially in patients without an acute decrease in heart rate. However,
this concept has recently been challenged. Some microneurographic studies
indicate that sympathetic withdrawal may not always be a prerequisite even for
the development of classic "vasodepressor" forms of syncope. Conversely, a
decrease in cardiac output appears to be a determinant factor for syncope in most
circumstances. This article reviews the relative contribution of cardiac output
versus sympathetic vasoconstriction in neurally mediated syncope in otherwise
healthy individuals. It is suggested that a moderate to severe fall in cardiac
output with or without vasodilatation may contribute to syncope.