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- Q3613169 subject Q7163848.
- Q3613169 abstract "T wave alternans (TWA) is a periodic beat-to-beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG).TWA was first described in 1908. At that time, only large variations ("macroscopic" TWA) could be detected. Those large TWAs were associated with increased susceptibility to lethal ventricular tachycardias.Most modern references to TWA refer to microvolt T wave alternans (MTWA), a non-invasive heart test that can identify patients who are at increased risk of sudden cardiac death. It is most often used in patients who have had myocardial infarctions (heart attacks) or other heart damage to see if they are at high risk of developing a potentially lethal cardiac arrhythmia. Those who are found to be at high risk would therefore benefit from the placement of a defibrillator device which can stop an arrhythmia and save the patient's life.The TWA test uses an electrocardiogram (ECG) measurement of the heart's electrical conduction. The test looks for the presence of repolarization alternans (T-wave alternans), which is variation in the vector and amplitude of the T wave component of the EKG. The amount of variation is small, on the order of microvolts, so sensitive digital signal processing techniques are required to detect TWA. See also wikidoc article on TWA.".
- Q3613169 thumbnail T-wave_alternans.png?width=300.
- Q3613169 wikiPageExternalLink www.cambridgeheart.com.
- Q3613169 wikiPageExternalLink T-Wave_Alternans_2027185_e.pdf.
- Q3613169 wikiPageExternalLink player.html?sid=070505LB01.6882.
- Q3613169 wikiPageExternalLink 567758_print.
- Q3613169 wikiPageExternalLink www.metrohealth.org.
- Q3613169 wikiPageExternalLink lectures.php.
- Q3613169 wikiPageWikiLink Q1047060.
- Q3613169 wikiPageWikiLink Q1072.
- Q3613169 wikiPageWikiLink Q12152.
- Q3613169 wikiPageWikiLink Q1329925.
- Q3613169 wikiPageWikiLink Q159190.
- Q3613169 wikiPageWikiLink Q189331.
- Q3613169 wikiPageWikiLink Q23548.
- Q3613169 wikiPageWikiLink Q37320.
- Q3613169 wikiPageWikiLink Q44528.
- Q3613169 wikiPageWikiLink Q56002.
- Q3613169 wikiPageWikiLink Q618728.
- Q3613169 wikiPageWikiLink Q7163848.
- Q3613169 wikiPageWikiLink Q7672706.
- Q3613169 wikiPageWikiLink Q79785.
- Q3613169 wikiPageWikiLink Q954202.
- Q3613169 comment "T wave alternans (TWA) is a periodic beat-to-beat variation in the amplitude or shape of the T wave in an electrocardiogram (ECG or EKG).TWA was first described in 1908. At that time, only large variations ("macroscopic" TWA) could be detected.".
- Q3613169 label "T wave alternans".
- Q3613169 depiction T-wave_alternans.png.