<unk>  (also known as Veno-atrial stretch<unk>  are low pressure baroreceptors that are found in the<unk> of the heart. They are myelinated vagal fibres in the endocardium found at the junction between<unk> and the vena cava/pulmonary vein. When these<unk>  detect a blood<unk>  increase in the<unk>  the<unk>  stretch triggers the release of<unk>  Natriuretic Peptide (ANP), and a signal is transmitted from the<unk>  to the hypothalamus in the brain. The ANP causes increased natriuresis, while the hypothalamus, in turn, decreases the production of vasopressin (ADH, AVP, or arginine vasopressin). These<unk>  also cause a renal vasodilation, resulting in increased diuresis. This decreases the blood<unk> , resulting in the decrease of blood pressure. There are two types, type A is activated by<unk>  wall tension in<unk>  contraction (during the a wave of the<unk>  pressure curve), type B is activated by<unk>  stretch during<unk>  filling (with the v pressure wave). They can display hysteresis.
Atrial volume receptors
Mechanosensitive channels
Cardiac action potential
Cardiac excitation-contraction coupling
Electrical conduction system of the heart
Vagal tone
Central chemoreceptors
End-plate potential