You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is not a positive ionotropic agent: September 2007 and explain in detail?
Ans. C: Diltiazem Positive inotropic agents increase myocardial contractility, and are used to suppo cardiac function in conditions such as decompensated congestive hea failure, cardiogenic shock, septic shock, myocardial infarction, cardiomyopathy, etc. Examples of positive inotropic agents include Berberine Bipyridine derivatives-Amrinone/lnamirone, Milrinone Calcium sensitisers-Levosimendan Cardiac glycosides-Digoxin Catecholamines-Dopamine, Dobutamine, Dopexamine, Epinephrine (adrenaline), Isoprenaline (isoproterenol), Norepinephrine (noradrenaline) Eicosanoids-Prostaglandins PDE inhibitor-Enoximone, Milrinone, Theophylline Glucagon Negative inotropic agents decrease myocardial contractility, and are used to decrease cardiac workload in conditions such as angina. Beta blockers Calcium channel blockers Diltiazem Verapamil Clevidipine Class IA antiarrhythmics such as Quinidine, Procainamide, disopyramide Class IC antiarrhythmics such as Flecainide