Q-interval

The Q interval is an important indicator in electrocardiography (ECG), which allows you to assess the condition of the heart and its work. This interval reflects the time interval between the beginning of the Q or R wave (positive wave on the ECG) and the beginning of the first sound on the phonocardiogram (PCG).

The Q interval is used to diagnose various heart diseases, such as myocardial infarction, arrhythmias and others. Normally, the Q interval should not exceed 0.06 seconds. If it is higher, it may indicate a heart problem and the need for further testing.

The Q interval can be measured either manually or using special instruments. The manual method requires a cardiologist to be highly qualified and experienced in working with ECG, as well as knowledge of the main symptoms of heart disease. However, this method is more accurate and can be used to diagnose difficult cases.

If the Q interval exceeds the norm, this may indicate various heart diseases, for example, heart failure, arrhythmias, myocardial infarction and others. In this case, additional examination and treatment is necessary.

Overall, the Q interval is an important indicator in diagnosing heart disease and can help a cardiologist determine the cause of symptoms and prescribe appropriate treatment.

The QT interval or q-interval is the time period during which the QRS wave of the ECG signal continues. In the image, it is spoken of in the context of what is called a complex QRS waveform. This term refers to areas of ECG signals that can be periodic or non-periodic. The size of the QT interval affects the rhythm of heart contraction, however, due to the fact that it is just a segment of the chain of myocardial activity, its value is of little help in diagnosing the condition of the heart muscle. However, the QT interval and associated bio