Implanted Cardioverter/Defibrillators
15.3.8 Implanted Cardioverter/Defibrillators
A similar code, known as the NASPE/BPEG Defibrillator Code or NBD Code,10 exists for implanted cardioverter/defibrillators (ICDs), as defined in Table 2.
Table 2. Defibrillator Codea
Position I (Shock Chamber) |
Position II (Antitachycardia Pacing Chamber) |
Position III (Tachycardia Detection) |
Position IV (Antibradycardia Pacing Chamber) |
|---|---|---|---|
O = none |
O = none |
E = electrocardiogram |
O = none |
A = atrium |
A = atrium |
H = hemodynamic |
A = atrium |
V = ventricle |
V = ventricle |
V = ventricle |
|
D = dual (A + V) |
D = dual (A + V) |
D = dual (A + V) |
a Reprinted from Bernstein et al10 by permission of Blackwell Publishing.
Table 3. Style Rules for Gene Symbols (Examples)
Gene Description |
Approved |
Gene Symbol Rule Illustrated |
|---|---|---|
α-fetoprotein |
AFP |
Greek letter changed to Latin letter (but not moved to end of symbol: exception to recommendation) |
β2-microglobulin |
B2M |
Greek letter changed to Latin letter; no subscripts or punctuation |
α-galactosidase |
GLA |
Greek letter changed to Latin letter and moved to end of symbol |
coagulation factor VIII |
F8 |
roman numeral changed to arabic numeral |
β1-galactosidase |
GLB1 |
Greek letter changed to Latin letter and moved with numeral to end of term; no subscripts or punctuation |
heterogeneous nuclear ribonucleoprotein A2/B1 |
HNRPA2B1 |
no punctuation marks or spaces |
MCF.2 cell line–derived transforming sequence |
MCF2 |
no punctuation marks |
5′-nucleotidase, cytosolic |
NT5C |
number moved from the start of symbol; no punctuation |
5S RNA, cluster 1 |
RN5S1@ |
first character is letter, not number |
thromboxane A2 receptor |
TBXA2R |
no superscripts or subscripts |
Examples are as follows:
DDH defibrillator
VOEO defibrillator
There is also a Short Form of the NBD Code intended only for use in conversation:
ICD-B: ICD with antibradycardia pacing as well as shock
ICD-T: ICD with antitachycardia pacing as well as shock and antibradycardia pacing
ICD-S: ICD with shock capability only
The foregoing terms can each represent a variety of devices; for instance, ICD-S could indicate VO, VOE, VOEO, DOH, or DOHV. The same devices may also be represented by more than 1 term, eg, ICD-B may also represent VO and VOE, among other devices. Therefore, only the Long Form is used in writing. As in the case of the NBG Code, at first mention of an ICD it is good practice to include a prose description as well as the NBD Code designation.
For maximum conciseness and completeness in ICD labeling and record keeping, the first 3 positions of the NBD Code are given, followed after a hyphen by the first 4 positions of the NBG Code. Thus, “VAE-DDDR” refers to an ICD providing ventricular shock, atrial antitachycardia pacing, EGM sensing for tachycardia detection, and dual-chamber, adaptive-rate antibradycardia pacing.