From this article, you will learn about whether coffee expands or contracts. Does the invigorating drink act equally on the blood supply of all organs, or are there differences( which)?In what doses can we talk about the benefits of coffee, and when its use is contraindicated.
- The vasodilating effect of coffee
- The vasoconstricting effect of coffee
- The daily dose of coffee
- Vascular indications for use
- When you can not drink coffee
- Side effects of the drink
On most blood vessels of the coffee, or its active ingredient - caffeine, has an expanding effect. The exceptions are:
- Brain vessels.
- Abdominal vessels( except kidney).
The effect is related to the general stimulating properties of the drink: to activate the central nervous system and the heart muscle, it is necessary to reduce the blood flow in the internal organs. Narrowing of the vessels of the brain leads to the activation of brain activity and the reduction of drowsiness. Expansion of the cardiac arteries improves the functioning of the myocardium in conditions of increased capacity for work.
Vasodilating action of coffee
Caffeine relaxes the walls of arterial vessels and thereby expands them in:
- heart muscle,
- skeletal muscle,
- kidney.
The effect of the drink on these structures and organs is presented in the table:
| Body or system | Action |
|---|---|
| Heart | Improvement of the blood supply of the muscle as a whole Prevention of angina pectoris Acceleration of the excitation wave with low pulse Increased blood flow in sites with moderate impairment of blood flowatherosclerosis Increased resistance to physical activity |
| Skeletal muscles | Increased muscle flow Acceleration of excretion of lactic acidafter intensive training Restoration of damaged muscle structures Increase in muscle contractility |
| Kidney | Moderate stimulation of work and consequent increase in urinary output Improvement of renal blood flow Moderate retention of sodium ions |
| Light | Improvement of blood filling of tissues Acceleration of oxygen saturation of blood passing through the alveoli |
Vasodilating action of coffee
Vessel constriction caused by caffeine occurs:
- in all ofbrain elah,
- in the system of internal organs blood.
The effects of the drink in this case are presented in the table:
| Body or system | Action |
|---|---|
| Brain | Decrease in oxygen demand Stimulation of cortical and subcortical centers Acceleration of brain structures Reducing or completely disappearing sleepiness |
| Gastrointestinal tract | Boostingactivity of gastric juice Accelerating the breakdown of carbohydrates and fats Slowing the progress of contents through the intestines |
| Small pelvic organs | Reduction of pain in bladder inflammation Moderate decrease in bloody discharge and menstruation pain |
Daily dose of coffee
In order for caffeine to have only a positive effect, it is necessary to strictly observe the daily norm of the drink. Exceeding the recommended dose will cause:
- Depletion of the cardiovascular and nervous system.
- Increased risk of arrhythmia.
- Disturbance of cerebral blood flow.
- Depression of the functions of the brain.
- Toxic effects from the gastrointestinal tract.
A lethal dose is 10 grams of caffeine per day, depending on the type of coffee it is 10 to 30 liters, so it's almost impossible to die from a large amount of a drink.
A daily caffeine rate of up to 600 mg divided into several doses. It is quite difficult to translate these data into exact volumes: the content of caffeine in the cup varies depending on the type of coffee from 60 mg( cappuccino) to 100-150 mg( espresso).
It's natural that the stronger the drink, the higher the concentration of caffeine in it and the fewer cups per day you can drink. General recommendations: 4-6 mugs of 150 ml per day.
Popular types of decaffeinated beverages still contain about 4 mg of caffeine, so if coffee is contraindicated, then its similar form is also prohibited. And in cases where the daily amount of caffeine should be limited - it is better to drink fresh ground coffee with milk or cream.
If you talk about the beneficial properties of the product in the field of cardiology, you should only use a natural drink. From a soluble species, and even more so in a bag, it is worth giving up because of the unpredictability of the effect of the effect. Coffee expands all the vessels of the heart muscle, only if its concentration is more than 50 mg, a smaller dose has practically no effect.
With prolonged use of large doses develops stability - the use of any amount of the drink has no effect on the vessels.
Vascular indications for use
In medical and folk practice, coffee can be recommended for use in the following cases:
- low blood pressure;
- is a moderate decrease in heart rate;
- small swelling in the area of the feet;
- the day after intense physical training;
- migraines;
- painful menstruation;
- drowsiness;
- decreased mental and physical tone.
Any doctor, before recommending coffee in order to increase pressure or pulse, will conduct a survey to exclude pathology requiring medication or surgery.
When you can not drink coffee
Despite the fact that coffee is not a medicine, its effect on the heart and blood vessels is very significant. Therefore, there are a number of contraindications for the use of this drink:
| Absolutely to exclude | Limit 1-2 cups per day |
|---|---|
| Children under 12 years old | Children from 12 to 18 years old |
| Pregnancy in the 1st trimester | Pregnancy in the 2-3 trimester |
| Breastfeeding | The tendency to increase blood pressure( upper - from 140 mmHg, bottom - 90 mmHg) |
| Hypertonic disease | Insomnia |
| Acute forms of blood flow disturbance in the heart muscle and brain | Nervous overexcitation |
| Heart rhythm disorder by type of tachyarrhythmia | Mental diseaseswith marked exaltation( psychosis) |
| Violation of renal function with large urine separation( oliguria) | |
| High sodium content in blood | |
| Ulcerative lesion of stomach, intestines during exacerbation | |
| Pathological dilatation of vessels( aneurysm) of any site | |
| Aged age( over 75-80 years) | |
| Severe atherosclerotic changes in arterial vessels | |
| Early postoperative period( 7-10 days) after any surgical procedures on the heart, vessels and brain | |
| Cranial cerebral herbsand | |
| Glaucoma( increased pressure inside the eye) |
Adverse effects
property beverage coffee wider or narrower vessels associated with the active agent - caffeine, and as any active substance, it has a number of adverse effects. Most often they occur in case of exceeding the recommended daily volume, but with individual high sensitivity, negative symptoms can appear even after one cup.
| Body system | body system | |
|---|---|---|
| system | ||
| central nervous system | ||
| anxiety disturbance | ||
| sleep disorder Cardiovascular | Cardiac arrhythmia abnormalities Increased blood pressure up to hypertensive crisis | |
| Digestive | Nausea Abdominal pain Vomiting Stool retardation | |
| Respiratory | Dyspnea |
