Facebook

2018年9月4日火曜日

How is AF diagnosed?

How is AF diagnosed? AF can be detected by a healthcare professional checking your pulse. If your pulse feels very fast and/or irregular, they may refer you for further tests to confirm whether you have AF, and if so, what type you have. AF that comes and goes can be hard to detect. To help diagnose it, you may be asked to wear a portable ECG monitor for 24 hours or more to check how your heart works over a longer period of time. This option is available in the Cardiospy ECG Holter system Detection of P wave in ECG Holter technique is a complex and difficult task as these waves are very small amplitude signals. In addition to sampling the ECG signal at a high amplitude resolution, quite strong disturbances make it difficult to detect this signal. The Cardiospy system simultaneously provides high amplitude resolution, efficient interference filtering, and reliable P wave detection. Algorithm of diseases based on the P wave detection in the Cardiospy Holter software Cardiospy software uses P wave analysis to detect AV blocks (AV-I, AV-II-M1, AV-II-M2, AV-III) and Atrial Fibrillation. This algorithm is developed by our colleague, Mr. László Farkas R/D manager, who has been working with digital signal processing for more than 30 years. Technical conditions of P wave detection To detect P waves, it needs high amplitude resolution, which is provided by the recorders of the Cardiospy system. The amplitude resolution is better than 0.6uV, which can even detect a few 10uV P waves. Good resolution is not enough, however, because very small P waves can be covered or distorted by minor noise. The Cardiospy filter system ensures that the P waves are displayed clearly.