The Intraventricular Conducting System and Patterns of Endocardial Excitation1

2015 ◽  
pp. 2-14 ◽  
Author(s):  
Robert J. Myerburg ◽  
Kristina Nilsson ◽  
Agustin Castellanos ◽  
Ralph Lazzara ◽  
Benjamin Befeler ◽  
...  
Keyword(s):  
Conducting System

scholarly journals Wenckebach phenomenon occurring in the distal conducting system in a young adult.

Heart ◽  
1976 ◽  
Vol 38 (2) ◽  
pp. 204-206 ◽  
Author(s):  
R Gray ◽  
V S Kaushik ◽  
W J Mandel
Keyword(s):  
Young Adult ◽  
Conducting System ◽  
Wenckebach Phenomenon

The systemic nature of the sunflower disease caused by Diaporthe helianthi

1991 ◽  
Vol 69 (7) ◽  
pp. 1552-1556 ◽  
Author(s):  
M. Muntanola-Cvetković ◽  
Jelena Vukojević ◽  
M. Mihaljčević
Keyword(s):  
Plant Diseases ◽  
Leaf Axil ◽  
Plant Tissues ◽  
Conducting System ◽  
Intercellular Spaces ◽  
Histological Studies ◽  
Leaf Petiole ◽  
Diaporthe Helianthi ◽  
Xylem Elements ◽  
Systemic Nature

The systemic nature of the disease of sunflower plants caused by Diaporthe helianthi, the leaf–petiole–stem route of the host invasion by the fungus, and the plant tissues that were successively affected were demonstrated through histological studies. After penetration into the host, the infection hyphae invade the intercellular spaces and terminal veinlets of the lamina and spread toward larger branches of the conducting system, the midrib, and the petiole. Xylem elements are invaded but are affected less by the fungus attack than the phloem and the parenchyma tissues, which disintegrate completely. Hyphae spread through the leaf axil to the tissues of the stem cortex, where pycnidia of the Phomopsis anamorph are initiated from internal masses of mycelium. Key words: systemic plant diseases, sunflower diseases, Diaporthe helianthi, Phomopsis helianthi.

scholarly journals The microcirculation and its measurement in sepsis

2016 ◽  
Vol 18 (3) ◽  
pp. 221-227 ◽  
Author(s):  
Matthew Charlton ◽  
Mark Sims ◽  
Tim Coats ◽  
Jonathan P Thompson
Keyword(s):  
Disease Severity ◽  
Clinical Use ◽  
Conducting System ◽  
Icu Patients ◽  
Microcirculatory Dysfunction ◽  
Microcirculatory Function

The microcirculation describes the smallest elements of the cardiovascular conducting system and is pivotal in the maintenance of homeostasis. Microcirculatory dysfunction is present early in the pathophysiology of sepsis, with the extent of microcirculatory derangement relating to disease severity and prognosis in ICU patients. However, at present microcirculatory function is not routinely monitored at the bedside. This article describes the pathophysiology of microcirculatory derangements in sepsis, methods of its measurement and evidence to support their clinical use.

Enzyme histochemical studies on the conducting system of the human heart

1980 ◽  
Vol 12 (5) ◽  
pp. 577-589 ◽  
Author(s):  
E. A. Elias ◽  
G. P. De Vries ◽  
R. A. Elias ◽  
A. J. Tigges ◽  
A. E. F. H. Meijer
Keyword(s):  
Human Heart ◽  
Conducting System

Repetitive Potentials Following Brief Electric Stimuli in a Hydroid

1961 ◽  
Vol 38 (3) ◽  
pp. 579-593
Author(s):  
ROBERT K. JOSEPHSON
Keyword(s):  
Electrical Stimulation ◽  
Average Velocity ◽  
Nervous Activity ◽  
Repetitive Stimulation ◽  
Conducting System ◽  
Threshold Intensity ◽  
Electric Shocks ◽  
Electrical Pulses ◽  
Minimum Interval ◽  
Shape And Size

1. Electrical pulses (amplitude -0.05 to -15 mV.; duration 20-120 msec.) have been recorded from the stolon of Cordylophora lacustris following stimulation. These pulses are propagated with an average velocity of 2.7 cm./sec. at 22° C. 2. Brief electric shocks of little more than threshold intensity can evoke bursts of pulses. The number of pulses in a burst increases with stimulus intensity, but the shape and size of individual pulses do not. 3. Repetitive stimulation causes facilitation of both size of single pulses and number of pulses in a burst. Refractory period, if present, is variable. The minimum interval between two pulses is about 200 msec. 4. Mechanical stimulation evokes pulses identical to those evoked by electrical stimulation. 5. The greater the number of pulses recorded in the stolon near a polyp, the greater and faster is the contraction of that polyp. 6. The number of pulses, but not their individual sizes, decreases with increasing distance from the point of stimulation. 7. It is concluded that conduction in the stolon and the electrical pulses are due to nervous activity and that the conducting system is a network having interneural junctions which sometimes require to be facilitated.

The Nerves and Muscles of Medusae

1955 ◽  
Vol 32 (4) ◽  
pp. 642-648 ◽  
Author(s):  
G. A. HORRIDGE
Keyword(s):  
Conducting System ◽  
Feeding Response ◽  
Radial System ◽  
Swimming Movement ◽  
Radial Muscle

1. The co-ordination of the swimming movement (beat) and feeding response in Aequorea forskalea has been studied with particular attention to the pathways taken by the excitation. 2. The rapid through-conducting system which co-ordinates the beat is sharply distinguished physiologically from the radial system which co-ordinates feeding. 3. The spontaneous origin of the beat and its rapid marginal conduction are both inhibited while the radial muscle is contracting. 4. Inhibition of this type has been observed in other genera of Hydromedusae

Sign in / Sign up

Export Citation Format

Share Document