| PTCRA | percutaneous transluminal coronary rotational ablation |
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| RAO | Rotational acetabular osteotomy |
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| RA | Rotational atherectomy |
| REDOR | Rotational echo double-resonance |
| CSAP | Cryosurgical ablation of the prostate |
| PTSMA | Percutaneous transluminal septal myocardial ablation |
| ablation | 1. A carrying or taking away; removal. 2. <medicine> Extirpation. 3. <geology> Wearing away; superficial waste. See: tolerate. Origin: L. Ablatio, fr. Ablatus p. P. Of auferre to carry away; ab + latus, p. P. Of ferre carry: cf. F. Ablation. (11 Mar 1998) |
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| catheter ablation | Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (dc-shock) or alternating current at radiofrequencies (usually 750 khz). The technique is used most often to ablate the av junction and/or accessory pathways in order to interrupt av conduction and produce av block in the treatment of various tachyarrhythmias. (12 Dec 1998) |
| rotational axis | An imaginary line around which a removable partial denture tends to rotate. Synonym: rotational axis. (05 Mar 2000) |
| rotational nystagmus | Jerky nystagmus arising from stimulation of the labyrinth by rotation of the head around any axis and induced by change of motion. (05 Mar 2000) |
| rotational transform | <radiobiology> \iota = 2PI/q) Due to the combination of applied toroidal field and induced poloidal field, the magnetic field lines wind helically around the torus (and on most flux surfaces they fill the surface ergodically). The rotational transform is a measure of this helicity, and is defined as the average angle the field line shifts in the poloidal direction per complete circuit in the toroidal direction. The quantity q = 2\pi / \iota is known as the "safety factor'' because of its role in stability theory. A magnetic field configuration is said to posses rotational transform if the lines of force, after one complete circuit around the configuration (for example, a torus) do not simply close exactly on themselves, but are instead rotated through some angle about the magnetic axies. (13 Nov 1997) |
| electrode catheter ablation | A method of ablating the site of origin of arrhythmias whereby high energy electric shocks are delivered by intravascular catheters. (05 Mar 2000) |
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