Beta-blockers once ingested go and bind themselves to certain sites /points of beta-receptors. They directly control the nerves of the body that sets heart rate and force of beat etc. As an effect, they bring down the heartrate; reduce the force of heartbeat and amount of blood pumped out of the heart per beat. Beta-blockers also reduce renin release by the kidney so that the amount of the extracellular volume such as blood plasma, lymph etc reduces thus bringing down blood pressure. It is precisely this action on our bodies that beta-blockers achieve that make them life-saving drugs that avert repeat heart attacks in patients. In addition, they slow down glycogenolysis, skeletal-muscle tremor and reduce the volume of gas exchange in the lungs.
Beta-blockers like Propranolol enter the blood-brain barrier and affect the central nervous system effect in reduction of sympathetic activity of the body. However, today a mixed prescription is often given to heart patients (Alpha plus Beta-blockers) to get more cover on cardiovascular, cardiorespiratory and other conditions. Remember, all medications should be prescribed by your doctor or physician and should be had in consultation with a certified medical professional suited for the treatment of your condition.
Mamta Singh is a published author, entrepreneur and a seasoned business, creative and academic writer. She is a certified fitness instructor, personal trainer & sports nutritionist through IFA, Florida. She is the lead writer and holds expert author status in many well-received health, fitness and nutrition sites. Mamta runs her own popular blog on migraines in women. She is a registered practitioner with the UN recognised Art of Living Foundation. Link: http://www.migrainingjenny.wordpress.com