Three or more wide QRS complexes, usually 0.14 sec. or more, rate >100/min. Regular or slightly irregular, usually starts or stops abruptly. AV dissociation is often seen (P waves unrelated to the QRS complexes). There may be capture or fusion complexes. The QRS pattern is often bizarre, with “concordance” in the precordial leads. (The QRS complexes are all positive or all negative from V1 to V6)
