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recurring at regular intervals (同)regular recurrence
the basic rhythmic unit in a piece of music; "the piece has a fast rhythm"; "the conductor set the beat" (同)beat, musical rhythm
the arrangement of spoken words alternating stressed and unstressed elements; "the rhythm of Frosts poetry" (同)speech rhythm
exhibiting ectopia

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〈U〉『律動,リズム』;韻律 / 〈C〉(特定の)リズム

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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2016/02/10 09:40:34」(JST)

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Atrial tachycardia or ectopic atrial tachycardia (EAT) is a type of atrial arrhythmia in which the heart's electrical impulse comes from ectopic atrial pacemaker, that is to say an abnormal site in the upper chambers of the heart or atria, rather than from the SA node which is the normal site of origin of the heart's electrical activity. Atrial tachycardias can exhibit very regular rates ranging typically from 140–220 bpm.^[1] As any other form of tachycardia, the underlying mechanism can be either the rapid discharge of an abnormal focus, the presence of a ring of cardiac tissue that gives rise to a circle movement - reentry - ^[2] or a triggered rapid rhythm due to other pathological circumstances as would be the case with some drug toxicities - digoxin toxicity.

One form is multifocal atrial tachycardia.

References

^ UCSF Benioff Children's Hospital: Atrial Tachycardia
^ Curr Opin Cardiol. 2001 Jan;16(1):1-7. Basic mechanisms of reentrant arrhythmias. Antzelevitch C.

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1. 心房粗動における洞調律の回復 restoration of sinus rhythm in atrial flutter
2. 心電図チュートリアル：心房性および房室結節性（上室性）不整脈 ecg tutorial atrial and atrioventricular nodal supraventricular arrhythmias
3. ジゴキシン中毒による不整脈 cardiac arrhythmias due to digoxin toxicity
4. Overview of circadian sleep-wake rhythm disorders
5. 心電図チュートリアル：心室性不整脈 ecg tutorial ventricular arrhythmias

English Journal

Catch the Ta wave: a source of ST-segment elevation.

Srour JF1, Hyder O2.Author information 1Department of Medicine, Cardiovascular Division, Brown University, Providence, RI, APC 737, Division of Cardiology, Rhode Island Hospital, 593 Eddy Street, Providence, RI, 02903. Electronic address: johnfanisrour@yahoo.com.2Department of Medicine, Cardiovascular Division, Brown University, Providence, RI, APC 737, Division of Cardiology, Rhode Island Hospital, 593 Eddy Street, Providence, RI, 02903.KEYWORDS: ST Segment Elevation, Ta wave, atrial repolarization, ectopic atrial rhythm
The American journal of medicine.Am J Med.2014 Jan 18. pii: S0002-9343(14)00036-9. doi: 10.1016/j.amjmed.2014.01.004. [Epub ahead of print]
PMID 24447836

Non-Invasive Electrocardiographic Mapping To Guide Ablation Of Outflow Tract Ventricular Arrhythmias.

Jamil-Copley S1, Bokan R2, Kojodjojo P1, Qureshi N1, Koa-Wing M1, Hayat S1, Kyriacou A1, Sandler B1, Sohaib A1, Wright I1, Davies DW1, Whinnett Z1, Peters N1, Kanagaratnam P1, Lim PB3.Author information 1Department of cardiac electrophysiology, St.Mary's and Hammersmith Hospitals, Imperial College NHS Healthcare Trust and Imperial College London, United Kingdom.2Cardioinsight Technologies, Cleveland, OH.3Department of cardiac electrophysiology, St.Mary's and Hammersmith Hospitals, Imperial College NHS Healthcare Trust and Imperial College London, United Kingdom. Electronic address: pblim@imperial.ac.uk.AbstractAIMS: Localising the origin of outflow tract ventricular tachycardias (OTVT) is hampered by lack of accuracy of ECG algorithms and infrequent spontaneous premature ventricular complexes (PVC) during electrophysiological studies (EPS). This study aims to prospectively assess the performance of non-invasive electrocardiographic mapping (ECM) in the pre-/peri-procedural localisation of OTVT origin to guide ablation and compare the accuracy of ECM to published ECG algorithms.
Heart rhythm : the official journal of the Heart Rhythm Society.Heart Rhythm.2014 Jan 16. pii: S1547-5271(14)00036-8. doi: 10.1016/j.hrthm.2014.01.013. [Epub ahead of print]
AIMS: Localising the origin of outflow tract ventricular tachycardias (OTVT) is hampered by lack of accuracy of ECG algorithms and infrequent spontaneous premature ventricular complexes (PVC) during electrophysiological studies (EPS). This study aims to prospectively assess the performance of non-in
PMID 24440381

Cushing's syndrome secondary to ectopic ACTH secretion from carcinoid tumor within an ovarian mature teratoma: a case report and review of the literature.

Huang B, Wu X, Zhou Q, Hu Y, Zhao H, Zhu H, Zhang Q, Zheng F.Author information Department of Obstetrics and Gynecology, The First Affiliated Hospital of Wenzhou Medical University , Zhejiang Province, Wenzhou , China.AbstractAbstract A 46-year-old woman with Cushing's syndrome secondary to ectopic adrenocorticotropic hormone (ACTH) secretion caused by primary ovarian mature teratoma with carcinoid components was presented in our case. The patient manifested sustained hypercortisolemia without circadian rhythm and a lack of suppression of either low-dose dexamethasone suppression test (LDDST) or high-dose dexamethasone suppression test (HDDST). There was no evidence of a pituitary mass or secretion of other hormones. After careful clinical evaluation, no other tumor masses were found. Resection of the ovarian tumors led to sharp reduction of serum ACTH and cortisol concentrations. Immunohistochemistry showed positivity in CgA, Syn, CK, NSE. To the best of our knowledge, there are rare reports of an ACTH-secreting carcinoid components located in an ovarian mature teratoma, and bilateral ovarian mature teratoma makes it rarer.
Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology.Gynecol Endocrinol.2014 Jan 7. [Epub ahead of print]
Abstract A 46-year-old woman with Cushing's syndrome secondary to ectopic adrenocorticotropic hormone (ACTH) secretion caused by primary ovarian mature teratoma with carcinoid components was presented in our case. The patient manifested sustained hypercortisolemia without circadian rhythm and a lack
PMID 24397395