Are you experiencing heart palpitations or unusual shortness of breath, or has your doctor noted an abnormality during a physical exam? Three medical tests are particularly useful for investigating these symptoms: the Holter monitor, the electrocardiogram (ECG), and spirometry. In Quebec, these tests can be obtained within a reasonable timeframe at a private medical clinic, without having to wait weeks in the public healthcare system.<\/p>\n
A Holter monitor is a device that continuously records the heart\u2019s electrical activity; it is worn for 24 to 48 hours (and sometimes up to 7 days for long-term monitors). Unlike a standard ECG, which captures only a few seconds of activity, the Holter monitor can detect intermittent arrhythmias that may not occur at the time of the test.<\/p>\n
Electrodes are placed on your chest and connected to a small recording device that you wear on your belt. The setup takes about 15 minutes. During the recording period, you continue your usual activities, noting any symptoms you experience in a journal. The only things you should avoid during the test are baths, showers, and water activities.<\/p>\n
A standard resting ECG records the heart\u2019s electrical activity for a few seconds using 10 electrodes placed on the limbs and chest. It is a quick (5 to 10 minutes), painless, and safe test. It can detect:<\/p>\n
An ECG is often the first test ordered during a consultation for cardiac symptoms, but it is also part of a preoperative health evaluation or an occupational health examination.<\/p>\n
To assess cardiac tolerance to exercise and screen for myocardial ischemia, a stress ECG may be ordered. This test is performed on a treadmill or exercise bike under continuous medical supervision. It is particularly recommended for people with cardiovascular risk factors who wish to resume sports or for whom angina is suspected.<\/p>\n
Spirometry, or pulmonary function testing (PFT), measures the volumes and flow rates of air that your lungs can produce. It is the gold standard test for diagnosing and assessing the severity of obstructive (asthma, COPD) and restrictive lung diseases.<\/p>\n
When is it prescribed?<\/strong><\/p>\n How does the exam work?<\/strong><\/p>\n You will be seated in front of a spirometer equipped with a mouthpiece. The technician or doctor will ask you to perform several breathing maneuvers: take a maximum breath in, followed by a forced exhalation as quickly and completely as possible. The maneuver is repeated three times to ensure the reproducibility of the results. The test takes about 20 to 30 minutes.<\/p>\n If you use bronchodilators (inhalers), your doctor will tell you whether you should avoid using them a few hours before the test. Avoid smoking, strenuous exercise, and eating a heavy meal within 2 hours before the test.<\/p>\n The results of the Holter monitor, ECG, and spirometry are raw data that require medical interpretation based on your clinical context. A normal Holter monitor reading does not rule out a rare paroxysmal arrhythmia, and normal spirometry results may coexist with asthma if the test was performed outside of an asthma attack.<\/p>\n The doctor who orders these tests is responsible for interpreting them in light of your symptoms, medical history, and the overall clinical picture. If the results are abnormal, the doctor will refer you to the appropriate specialist: a cardiologist, pulmonologist, or thoracic surgeon.<\/p>\n ECG, Holter and MAPA | Clinique Omicron<\/a><\/p><\/blockquote>\n\n
Spirometry preparation<\/h3>\n
Results and interpretation: the role of the physician<\/h3>\n