Synonym for atrioventricular junctional rhythm. Imprecisely defined zone surrounding and including the A-V node and the adjacent atrial and ventricular myocardium. The time from the beginning of atrial systole to the beginning of ventricular systole as measured from pressure pulses or cardiac volume curves in animals, or from the electrocardiogram in humans. Larger arteriovenous shunts can place strain on the heart since arterial blood is diverted back to the venous circulation before it has a chance to deliver nutrients and oxygen to the body tissues. The surgical joining of an artery and a vein under the skin for the purpose of haemodialysis. An extrasystole arising from the 'junctional' tissues, either the A-V node or A-V bundle. Synonym for atrioventricular extrasystole. Any situation in which atria and ventricles are activated and contract independently, as in complete A-V block, more specifically, the dissociation between atria and ventricles that results from slowing of the atrial pacemaker or acceleration of the ventricular pacemaker at nearly equal (rarely equal) ra … Synonym for atrioventricular dissociation. Arteriovenous difference of concentration of a substance. Some medications may precipitate atrioventricular conduction abnormalities. Any condition which involves abnormal (blocked, delayed or aberrant) electrical conduction through the atrioventricular node (for example atrioventricular block). Synonym for atrioventricular conduction abnormalities. The canal in the embryonic heart leading from the common sinuatrial chamber to the ventricle. Clinical types are divided into first (nonserious), second and third degree (most serious). A conduction disturbance that results in the inappropriate delay (or complete inability) of a electrical impulse, generated in the atria, to reach the ventricles (via the atrioventricular node). The bundle of modified cardiac muscle fibres that begins at the atrioventricular node as the trunk of the atrioventricular bundle and passes through the right atrioventricular fibrous ring to the membranous part of the interventricular septum where the trunk divides into two branches, the right crus of the atr … Not to be confused with surgical anastomosis, nor with arteriovenous fistula. A vessel that directly interconnects an artery and a vein, and that acts as a shunt to bypass the capillary bed. Strabismus in which esotropia is more marked in looking upward than downward, strabismus in which exotropia is more marked on looking downward than upward. A protein found in the cell wall of the bacterium Staphylococcus aureus which binds to the Fc section of immunoglobulins and is therefore used to collect antigen-antibody complexes. An icosahedral (20-sided) virus that contains DNA, there are over 40 different adenovirus varieties, some of which cause the common cold. The time between onset of the atrial deflection and the nodal potential (normally 40-100 msec). In diagnostic ultrasound, a one-dimensional presentation of a reflected sound wave in which echo amplitude (A) is displayed along the vertical axis and time of rebound (depth) along the horizontal axis the echo information is presented from interfaces along a single line in the direction of the sound beam. The time from the initial rapid deflection of the atrial wave to the initial rapid deflection of the His bundle (H) potential it approximates the conduction time through the A-V node (normally 50-120 msec). P-H conduction time is from the onset of the P wave to the first high frequency component of the His bundle electrogram (normally 119 &plusm … Forward conduction of the cardiac impulse from atria to ventricles via the A-V node or any bypass tract, represented in the electrocardiogram by the P-R interval. This form is also assumed by DNA-RNA hybrid helices and by regions of double-stranded RNA. This form is less common than the dominant form found under physiological conditions - beta-DNA. A-DNA is stable in dehydrated conditions. One of several forms that can be assumed by a double helix. It is used in biotechnology to induce these functions in mutant strains of Streptomyces that cannot produce it themselves. A protein which is found in the bacterial genus Streptomyces that helps start the production of streptomycin and the process of morphological differentiation. ĭivergent strabismus greater in downward than in upward gaze. Ĭonvergent strabismus greater in upward than in downward gaze. A form of DNA in which the helix is right-handed and the overall appearance is short and broad.
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