E heart is a muscle that squeezes blood and functions like a pump. Each part of the heart is susceptible to failure or dysfunction and the heart could be divided into the mechanical and the electrical. Cheap herbal viagra uk The electrical part of the heart is centered on the periodic contraction (squeezing) of the muscle cells that is caused by the cardiac pacemaker located in the sinoatrial node. generic viagra safe use The study of the electrical aspects is a subfield of electrophysiology called cardiac electrophysiology and is epitomized with the electrocardiogram (ecg/ekg). Buy viagra online legit The action potentials generated in the pacemaker propagate throughout the heart in a specific pattern and is the system that carries this potential is called the electrical conduction system. can buy viagra toronto Dysfunction of the electrical system manifests in many ways and includes wolff–parkinson–white syndrome, ventricular fibrillation, and heart block. viagra without prescriptions australia The mechanical part of the heart is centered on the fluidic movement of blood and the functionality of the heart as a pump. The mechanical part is ultimately the purpose of the heart and many of the disorders of the heart disrupt the ability to move blood. buy brand viagra online canada Failure to move sufficient blood can result in failure in other organs and may result in death if severe. Heart failure is one condition in which the mechanical properties of the heart have failed or are failing, which means insufficient blood is being circulated. buy viagra online generic [edit] disorders cardiology is concerned with the normal functionality of the heart and the deviation from a healthy heart. where can i buy viagra gel Many disorders involve the heart itself but some are outside of the heart. viagra without prescriptions australia [edit] disorders of the coronary circulation coronary arteries labeled in red text and other landmarks in blue text. how to buy viagra over the counter in canada Contrary to a basic understanding of the cardiovascular system, the heart cannot receive enough oxygen and nutrients f. Buy viagra in uk over the counter