WO2000053092A1

WO2000053092A1 - Exercice testing system

Info

Publication number: WO2000053092A1
Application number: PCT/GR2000/000011
Authority: WO
Inventors: Andreas Michaelides; Dimitris Richter; Polychronis Dilaveris; George Andrikopoulos; Zoi Psomadaki
Original assignee: Andreas Michaelides; Dimitris Richter; Polychronis Dilaveris; George Andrikopoulos; Zoi Psomadaki
Priority date: 1999-03-08
Filing date: 2000-03-03
Publication date: 2000-09-14
Also published as: GR1003299B

Abstract

An exercise testing system comprises in addition to the usual 10 electrodes for the recording of the 12 classical electrocardiographic leads, an additional 6 right precordial leads. The system further consists of a monitor, a treadmill (with a ramp angle of incline that can increase), a recorder for the recording of all (18) leads or for as many as the examiner selects in any possible combination between them and 11-16 electrodes instead of the usual 10, with the extra leads being placed in the positions RV3, RV4, RV5, RV6, RV7 and RV8 or 13 electrodes instead of the usual 10, with the extra leads being added in the positions RV3, RV4 and RV5.

Description

EXERCICE TESTING SYSTEM V -

This invention refers to a new exercise testing system The basic innovation of this s\ stem is its ability to simultaneously record and analyze six additional πght-chest sided precordial leads Standard commercial exercise testing systems consist of a treadmill (with a ramp angle of incline that can increase) ramp, a monitor, a recorder and 10 electrodes for the recording of the 12 classical electrocardiographic leads These electrodes are common to all commercial exercise testing systems, and are connected to RA (right arm). LA (left arm). RL (right leg). LL (left leg). VI to V6 (the usual 6 precordial leads) (Figure 1)

With the addition of six accessory right precordial leads RV3. RV4. RV5. RV6. RV7 and RV8 which we placed in right hemithorax in correspondence with the left chest leads, we significanth improved the detection of electric potentials originating from the right and posterior myocardial areas in relation to a standard exercise testing system This addition improves significantly the ability of this device to detect coronary artery disease in everyday clinical practice

The exercise-systems currently in use cannot record all the aforementioned leads simultaneously and consequently the use of a second exercise testing system is inevitable when the recording of right precordial leads is of clinical interest Nonetheless, the use of two exercise testing systems is time-consuming and expensive for most laboratories According to the prescπption of actual exercise testing systems we need to add 10 electrodes from each device in order to record the 18 leads required Ten electrodes from the first system for the recording of the standard 12 leads and 10 electrodes from the second system in order to record the additional 6 πght chest leads are needed with the existing conventional equipment Most importantly, this method requires also the presence of an additional technician or cardiologist in order to look after two monitors and two recorders

Our new device has the ability to record contemporanly all 18 leads, reduces the space occupied in the lab. needs only one technician and is cost-effective and less time- consuming when compared with the two systems actually employed According to our invention this system consists of a treadmill (with a ramp angle of incline that can increase), a monitor which can show simultaneously all 18 leads or groups of leads according to the examiner w ill, a recorder for the recording of all 18 leads or the leads selected by the examiner and 16 electrodes connected to the classical 12 leads (2 unipolar arm leads. 2 unipolar leg leads, and 6 precordial leads) plus the extra 6 right precordial leads

Claims

CLAIMS This exercise testing system with the addition of right precordial leads consists of a monitor, a treadmill (with a ramp angle of incline that can increase), a recorder for the recording of all 18 leads or the standard 12 leads plus any combination between the group of the 6 right precordial leads the examiner wishes to use and 16 electrodes which are placed on the patient and connected with the device instead of the usual 10 These electrodes are of similar characteristics with the actually commercial electrodes The patient gets connected with the usual left and right upper and lower limbs and the 6 classical precordial leads (VI -V6) as well as with the 6 right chest precordial leads (RV3. RV4. RV5. RV6. RV7. RV8) The system will be able to record all 18 leads contemporaneously (using the 16 electrodes) or any possible combination between the 6 right precordial leads the examiner wishes plus the other standard 12 leads The exercise testing system of 15 leads (where the ideal combination of right precordial leads addition is. which means the best association between sensitivuy and specificity) consists of a monitor, a treadmill (with a ramp angle of incline that can increase), a recorder for the recording of the 15 leads or the leads the examiner wishes to record and

13 electrodes which are connected to the patient instead of the usual 10 electrodes These electrodes have similar characteristics with the actual commercial electrodes The patient gets connected with the usual left and right upper and lower limbs and the 6 classical precordial leads (V1-V6) as well as with the 3 right chest precordial leads (RV3. RV4, RV5) (Figure 1) The system will be able to record all 15 leads contemporaneously (using the 13 electrodes) or in any possible combination between them