Cholera toxin is an A-B toxin secreted by V. cholerae that causes the host cell to expel large amounts of water and ions. The toxin is made up of five identical B subunits linked to one A subunit.
An electrocardiogram (EKG or ECG) is a test that checks for problems with the electrical activity of your heart. An EKG shows the heart 's electrical activity as line tracings on paper.The spikes and dips in the tracings are called waves.The heart is a muscular pump made up of four chambers.n EKG is done to: 1  Check the heart's electrical activity. 2  Find the cause of unexplained chest pain or pressure. 3  Find the cause of symptoms of heart disease. 4  Find out if the walls of the heart chambers are too thick. 5  Check how well medicines are working and see if they are causing side effects that affect the heart. 6  Check how well mechanical 7  ... Che
ECG (EKG) (electrocardiogram): A record of the electrical impulses that immediately precede contraction of the heart muscle. The waves produced are known as the P,Q,R,S and T waves. An ECG is a useful means of diagnosing disorders of the heart, many of which produce deviations from normal electrical patterns. Electrocardiography causes no discomfort. Electrodes connected to a recording machine are applied to the chest, wrists, and ankles. The machine displays the electrical activity in the heart as a trace on a moving graph or on a screen. An ECG can be taken at home; a 24-hour record can be obtained from a tape recorder worn by the patient.