Ergometry can provide evidence of calcification of the coronary vessels. Our heart beats about 60-80 times a minute. In this time it has to contract and then expand again. Only during the expansion-time the heart muscle itself is supplied with blood and thus oxygen. During the contraction-time the heart’s own supply vessels are pressed down and provide no further oxygen to the heart.
The blood circulation of the inner layers of our heart muscle is limited by calcification, because due to the reduced diameter of the corresponding vessels, less blood per time can flow through and provide oxygen to the muscle.
Without physical effort this does not disturb the patient further. We remember: the heart beats in peace about 60-80 times a minute. However, if we strain, then the pulse also increases according to the physical exertion and with it of course the time the heart muscle gets to recover. This naturally also reduces the time that the heart muscle has to supply itself with blood and thus oxygen.
During a stress ECG, we want to provoke exactly this situation to see if there is a decrease in blood flow to the heart. We can capture the changes, which are recorded in the ECG.
Execution and Implementation
Before carrying out the ergometry, a few diseases must be excluded beforehand. For this reason an ultrasound examination is usually carried out beforehand, in which we also look at the heart again. If neither heart nor blood pressure speak against carrying out the ergometry, it means for you to cycle up the Feldberg.
To do this, you will first be wired and connected to the system and after measuring the blood pressure values and the saturation values, you start with a light load level (usually between 25 – 50 watts) and this is increased every 2 minutes by 25-30 watts. You must try to maintain the “speed” displayed to you via a marker on the bike throughout the investigation.
You then pedal until you can no longer feel chest pain or severe air distress, or we tell you that the examination is now finished. Formal termination criteria for this examination are new heart problems, a severe lack of air, a drop in blood pressure under the load of more than 10mmHg to the previously measured value, a systolic blood pressure of more than 200mmHg and changes in the ECG.