The P-TEFb–containing complexes include 7SK snRNP assembled with PIC on the HIV-1 promoter (1), 7SK snRNP that may not be part of PIC (2), the Brd4:P-TEFb complex (3) and the HIV-1 Tat ...

This means an ECG showing atrial fibrillation will have no visible P waves and an irregularly irregular QRS complex. The ventricular rate is frequently fast, unless the patient is on AV nodal ...