TY  - CHAP
M1  - Book, Section
TI  - Ventricular Tachycardia
A1  - Prystowsky, Eric N.
A2  - Prystowsky, Eric N.
A2  - Klein, George J.
A2  - Daubert, James P.
Y1  - 2020
N1  - 
T2  - Cardiac Arrhythmias: Interpretation, Diagnosis, and Treatment, 2e
AB  - Ventricular  tachycardia  (VT)  is  protean  in  form,  duration,  clinical  setting,  and  prognosis.  There  is  no  uniformly  accepted  classification  of  VT,  and  this  arrhythmia  may  be  subdivided  using  many  factors,  as  noted  in  Table  8-1.  Unfortunately,  no  single  subcategory  provides  enough  information  for  correct  classification  of  all  patients  with  VT,  and  in  many  instances  there  is  substantial  crossover.  For  example,  in  many  patients  the  mechanism  of  tachycardia  is  not  certain.  Whereas  reentry  is  the  presumptive  mechanism  for  sustained  VT  in  patients  who  have  coronary  artery  disease  with  a  previous  myocardial  infarction  and  ventricular  scar,  the  mechanism  of  exercise-induced  VT  may  include  enhanced  automaticity,  triggered  activity,  and  probably  reentry.  Thus,  our  present  state  of  knowledge  regarding  mechanism  of  VT  precludes  use  of  this  sole  criterion  for  classification.  The  other  potential  classification  variables  listed  in  Table  8-1  also  have  deficiencies.  It  is  often  more  useful  to  define  a  set  of  variables  for  a  particular  type  of  tachycardia  so  as  to  provide  the  clinician  with  a  meaningful  approach  to  the  patient  who  has  that  arrhythmia.  For  example,  patients  with  no  definable  structural  heart  disease  who  have  right  bundle  branch  block,  left  axis  morphology  sustained  VT  are  a  select  subgroup  for  whom  the  location  of  this  tachycardia  is  known  and  response  to  therapy—for  example,  endocardial  radiofrequency  catheter  ablation  or  oral  verapamil—has  been  well-documented.1-3  We  will  approach  the  classification  of  VT  by  clinical  presentation  in  order  to  aid  the  clinician  taking  care  of  these  patients.  
SN  - 
PB  - McGraw Hill
CY  - New York, NY
Y2  - 2024/04/20
UR  - accesscardiology.mhmedical.com/content.aspx?aid=1176522444
ER  -