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ECG-signs of angina heart

Angina is one of the forms of coronary heart disease (CHD), caused in the initial stage of a transient spasm of the coronary vessels supplying the myocardium. After removing the spasm all the manifestations disappear. In the diagnosis it is important to record not only patient complaints, but objective evidence of disease.

In what ways are guided by doctors in the direction of the ECG?

Clinical symptoms of angina are well known. In 75% of patients are:

  • paroxysmal pain behind the breastbone lasting from a few seconds to 40 minutes;
  • the radiating to the left side of the chest, shoulder, lower jaw;
  • crushing or compressive in nature;
  • accompanying arrhythmias, dizziness, shortness of breath.

The effectiveness of Nitroglycerin for relief of pain syndrome speaks in favor of angina.

For more accurate diagnostics using instrumental methods of examination. One of the most affordable — electrocardiographic. ECG if angina is objective evidence a sign of disturbed balance between the need of the myocardial cells for oxygen and his receipt. The equipment is equipped with machines "Ambulance", all the clinics, aid stations. Possible ECG changes introduced to the doctors of any specialties.

Features of registration of the signs of angina

At the initial stage of development of IBS pain symptoms in heart occur during excessive physical or emotional stress, Smoking. This kind of disease is called "angina".

Differential diagnosis of

Registered changes of ST segment and T wave characteristic not only of angina pectoris. They are observed in degenerative disorders of the myocardium to various reasons, myocarditis, electrolyte disorders.

To help distinguish their drug tests:

  • positive changes after taking Nitroglycerin indicate ischemia of the heart;
  • improvement of ECG pattern after administration of potassium-containing drugs are not typical for IBS, and confirms electrolyte changes;
  • a positive result after taking, Obsidan more characteristic of myocardiodystrophy of neuroendocrine origin, but it is possible and angina.

The use of physical stress tests and ECG-changes

The use of dosed physical loads to identify the underlying pathology, stage of disease is widely used in cardiology. Application tests are carried out in the presence of a physician with a preliminary examination and ECG examination. Takes into account heart rate, blood pressure, oxygen consumption.

  1. The most commonly used dynamic test Wizard-Oppenheimer. They introduced in 1929, "Harvard step test",standardized the study, developed the evaluation table. In the modern version the patient is asked to walk up and down the stairs for 1.5 minutes (easiest option) or three minutes (double test). Method is the most physiologic.
  2. Application veloergometry (Ergometer — a stationary bike, having graduated load in units of power) is based on high sensitivity. 80 – 95% of cases, changes with a load of talking about of angina. Evaluation standards provide for deflection of the ECG in mm and stored in fractions of a second.
  3. The same test is performed with the track on the treadmill. Treadmill is driven by a motor and allows you to set different speed modes.
  4. There are static tests. These include load involving muscle contraction without shortening fiber length. Apply compression and unclasping the hold of gravity, hands, feet.