Figure 5: Acute Haemodynamic Improvements Seen with His Pacing in Narrow QRS and Long PR Interval.
When compared to the acute haemodynamic studies that investigated atrioventricular (AV)- optimised biventricular pacing in left bundle branch block (LBBB), the acute blood pressure (BP) increase in a study of AV-optimised His pacing in patients with PR prolongation >200 ms showed approximately 60 % of the increase.[47]