From this article you will learn: what is stress echocardiography for, what are the types of procedure, how each of them is carried out. Whether there are contraindications how to be prepared for procedure.
Contents of the article:
- Indications
- Species
- Preparation for procedure
- Procedure
- Contraindications
- Pros and cons of different types of stress EchoCG
Stress Echocardiography is the ultrasound of the heart in combination with the load on it. It allows to identify diseases at the initial stage, which do not manifest in a state of rest, and also check the endurance of the heart.
It differs from the usual echocardiogram in that it is performed with a load on the heart: physical( for physical exercises), pharmacological( with the admission of special drugs) or electrical( with special effects of electrical impulses) - while the usual echocardiography is carried out at rest.
The essence of the method is to examine the heart at a time when it contracts at maximum frequency and requires more oxygen than at rest. To create such conditions, the load is used.
Assigns diagnosis and diagnoses after decoding the cardiologist, the procedure is performed by a cardiologist and an ultrasound specialist.
Indications
Echocardiography stress can detect coronary heart disease in the early stages and postinfarction cardiosclerosis - diseases that provoke heart failure can cause arrhythmias and sudden cardiac death.
Assign it in such cases and for this purpose:
- Before heart surgery, to make a prediction and assess the risk of complications.
- If normal echocardiogram and ECG have shown normal results, but a person is at risk of developing coronary artery disease( wrong way of life, heredity, high cholesterol, metabolic disorders, vascular diseases, etc.).
- If the stress ECG is not informative.
- To assess the effectiveness of treatment and prognosis for ischemic heart disease.
- For checking the endurance of the heart of professional athletes and assessing the person's ability to work.
- To accurately identify the workable and affected areas of the myocardium.
Species of stress
Types of stress Echocardiography depending on the type of heart load:
| Physical | Treadmill test( with walking on the treadmill) |
|---|---|
| Bicycle ergometer in sitting position( patient pedals) | |
| Bicycle ergometry in lying position | |
| Electrical | Transesophageal electrostimulation of atria |
| Pharmacological | Reception of dobutamine |
| Reception of dipyridamole | |
| Adenosine admission |
Preparation for
procedure To get the most reliable diagnostic results,was observed a few rules:
- advance tell your doctor about all medications you are taking. Perhaps, their reception will have to be canceled on the day of the procedure, since they can influence the results of the examination or not be combined with the drugs that are used for the pharmacological stress on the heart.
- During the day before the examination, do not drink coffee, strong tea, energy drinks, alcohol. Refrain from smoking.
- If you are undergoing EchoCG stress with transoesophageal electrostimulation, tell your doctor if you have nose problems( polyps in the nose, curvature of the septum, frequent bleeding).
- Do not expose the body to any physical activity 3-4 hours before the procedure.
- Eat the last time not later than 3 hours before the procedure.
- If physical exertion is used, wear lightweight comfortable clothing that does not stifle the movements.
Conducting the procedure
All examination takes no more than 1 hour.
Stress Echocardiography is carried out in several stages:
- First, do ultrasound of the heart in a calm state. The patient undresses to the waist, lies on the couch on the left side. On the chest, a gel is applied and, using an ultrasound transducer, a picture of the heart is displayed.
- Next, the heart is given a load. Depending on the type of procedure performed, it can be the introduction of special drugs( dobutamine, dipyridamole, adenosine) into the vein, walking on a treadmill, using a bicycle, electric stimulation of the atria through the esophagus( electrode inserted into the esophagus through the nose, rarely through the mouth).
- Echocardiogram( cardiac ultrasound) continues to be performed during a heart load( pharmacological, electrical or bicycle ergometry in a recumbent position).When bicycle ergometry in a sitting position or walking on a treadmill, EchoCG is carried out immediately after the load, as during it it is almost impossible to do it.
- The intensity of the load is increased gradually. The speed of the torsion of the pedals( or the frequency of electrical pulses) is increased every 2-3 minutes. If pharmacological drugs are used, a new dose is also administered every 3 minutes.
- The duration of the load is about 10-15 minutes.
- The procedure can be terminated prematurely, if you have pain in the heart, nausea, dizziness, suffocation. Stress echocardiography with physical exertion can stop if you feel strong muscle fatigue.
- Sometimes it may be necessary to administer medications that bring the heart's work back to normal after the procedure.
- In addition to EchoCG, throughout the procedure can register and ECG.
The doctor will then analyze all the data obtained, compare the results of the Echo CG before and during( or after) the load.
Contraindications
Common to all types of stress Echo KG
- acute and subacute stage of myocardial infarction;
- aortic aneurysm;
- heart aneurysm;
- unstable angina;
- stable angina 3-4 functional class;
- 2B-3 stage of heart failure;
- acute thrombophlebitis;
- severe aortic stenosis;
- severe arrhythmias;
- acute infectious diseases;
- inflammatory heart diseases( myocarditis, pericarditis, endocarditis);
- progressive diabetes mellitus;
- severe thyroid dysfunction;
- pregnancy;
- is a mental disorder in which the patient is unable to adequately perceive the procedure and follow the doctor's instructions.
The contraindications listed above are relevant for Echocardiography stress with any type of exercise. In addition to them, each species has its own specific limitations, which are added to the above.
Contraindications for different types of stress echocardiography
| with exertion | Obesity 2-3 degrees |
|---|---|
| Essential hypertension | |
| Tachycardia( rapid heart beat) | |
| C transesophageal pacing | esophageal disease( esophagitis, varicose veins, tumors, diverticula, strictures) |
| atrioventricular block 2-3 degree | |
| Intracardiac thrombus | |
| Presence of prosthetic valves | |
| Atrial fibrillation | |
| Severe prostate diseases | |
| Closed-jawOrdering From a pharmacological glaucoma | |
| load | Idiosyncrasy preparations |
| Heavy bronchial and lung diseases( e.g., bronchial asthma) | |
| 2-3 degree atrioventricular block |
Pros and cons of various kinds of stress echocardiography
Each type has its advantages and disadvantages. Echocardiography with different types of heart load is advisable to conduct in different cases.
Pros of different types of stress Echocardiogram
| Species | Pros |
|---|---|
| With physical exertion | This test is the closest to reality and allows you to reliably estimate how the heart will behave under high physical exertion( for example, during intense sports activities). |
| With electrical stimulation of the heart through the esophagus | Such stress of Echocardiography can be carried out to patients who are unable to perform physical exercises or who are contraindicated. |
| You can get images of better quality, because the subject does not perform movements. | |
| During transoesophageal electrostimulation, in contrast to exercise, pressure does not increase. | |
| With medicamentous loading | It is possible to carry out to those to whom intensive physical exercises are counter-indicative. |
| There are no inconveniences associated with the introduction of an electrode into the esophagus. |
Cons of different types of procedure
| Variety | Cons |
|---|---|
| With physical exertion | Since the physical load is accompanied by shortness of breath, it is difficult to achieve a clear image of the left ventricle. |
| With transoesophageal electrical stimulation | This test is not physiological, so it can not be used to accurately predict the behavior of the heart during exercise. |
| The patient feels the discomfort associated with the introduction of the electrode into the esophagus. | |
| 30% of patients develop atrioventricular block, which is removed by intravenous injection of atropine. It should not be used with closed-angle glaucoma, severe prostatitis and prostate adenoma. | |
| With pharmacological loading of | During the introduction of medications, side effects such as a feeling of increased heart rate, dizziness, and chest discomfort may appear. |
Stress echocardiography compared with conventional echocardiography is much more effective for the diagnosis of coronary heart disease. It allows to identify the disease when it is not yet manifested, and prevent its further development. The main disadvantage of such a diagnostic procedure is the presence of risks associated with the load on the heart, as well as a large list of contraindications, while the usual echocardiography does not have them.
