- Atenolol - if you play tricks heart
Adrenaline and its effect on the body
Adrenaline - a hormone of the adrenal medulla, which is a neurotransmitter, that is, it transmits excitation (information) on the nerve cells. The various tissues and organs have cells receptors sensitive to the action of epinephrine, and are called adrenoceptors are divided into alpha- and beta-adrenergic receptors.
Adrenaline contributes to the emergence of fast reactions that occur in stressful situations, and the entire body is going to give an immediate response to the aggression: the blood vessels constrict, blood pressure rises, the heart beats faster. On the contrary, it relaxes the muscles of the bronchi and the air freely enters the lungs - the body needs extra oxygen. The increase in blood glucose appears
Glucose: The energy source
to strengthen the tissue metabolism and more energy. There has also reinforced the breakdown of fats and proteins.
Blockers - substances that reduce action of adrenaline
Blockers - substances that block adrenergic receptors, resulting in the latter losing the ability to capture the adrenaline. Such substances are divided into alpha and beta blockers, among which are the types 1 and 2:
- alpha 1-blockers relieve spasm of the small arteries and thus lower blood pressure;
- alpha2-adrenergic blockers contribute to high blood pressure, not affecting certain structures of the brain (drugs of this group is not);
- beta1-blockers help reduce blood volume, which is released into the bloodstream with a heartbeat, it causes a decrease in blood pressure and slows the heart rate.
- beta2-adrenergic blockers cause contraction (spasm) of the bronchi.
Blockers, which act only on one type of receptor, called selective.
What is atenolol
Atenolol - a selective beta1-blocker, so it causes a decrease in blood pressure, increased coronary blood vessels (blood vessels that feed the heart muscle), and normalizing heart rhythm (antiarrhythmic) action. On the first day after oral administration due to the decrease in cardiac output response is marked narrowing of blood vessels, the severity of which is within one to three days gradually reduced.
The hypotensive (pressure reduction), the effect associated with decreased cardiac output, decreased activity of the chemicals that contribute to the rise of pressure (renin-angiotensin system) effects on the central nervous system and so on. The antihypertensive effect is a decrease in both systolic (top) and diastolic (bottom) pressure and continues throughout the day. The pressure becomes stable at regular intake of the drug within two weeks.
Dilates coronary vessels of the heart (antianginal) action takes place by reducing the need for oxygen in the cardiac muscle by decreasing the heart rate.
The heart rate at rest and during exercise is reduced. Antiarrhythmic effect is due to the elimination of the influence of the sympathetic nervous system (part of the autonomic nervous system, comprising mostly under stress) activity of the heart.
At therapeutic doses, did not affect the beta2-adrenergic receptors, and does not cause bronchoconstriction.
Indications for use
Atenolol is indicated for:
- high blood pressure;
- coronary heart disease, including prevention of strokes;
- at various cardiac arrhythmias.
Atenolol wary appoint diabetes
Diabetes - threatening and incurable disease
(can enhance the release of glucose in the blood), allergies, chronic obstructive pulmonary (with impaired patency of the bronchi) pulmonary disease, peripheral vascular patency (occlusive disease), chronic renal and liver failure, increased thyroid function
The thyroid gland - is responsible for your hormones
Depression - a little more than a bad mood
, Psoriasis, pregnancy and old age.
Atenolol is a time-tested quality product. But prescribe it with all the indications and contraindications may only doctor.