LBBAP Capture Surveillance

Threshold divergence & margin to programmed output

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LBB-capture threshold (V6RWPT jump) Myocardial (LVS) capture threshold Device capture-mgmt (myocardial-only — blind to bundle) Programmed output Projected bundle-loss trajectory

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decremental threshold test + 12-lead morphology at programmed output

Date *

Context

Pulse width (ms)

Programmed output (V) *

LBB threshold (V) *

Myocardial threshold (V)

Device CM threshold (V)

V6RWPT / LVAT (ms)

Stim→V6 peak (ms)

Stim→QRS latency (ms)

V6–V1 interpeak (ms)

QRS duration (ms)

Capture type @ output

V6RWPT stable (no alternans/intermittency)

V1 terminal R present

NS→S at fixed output (retraction flag)

Symptoms / notes

Divergence (LBB−myo)—

Safety margin (prog−LBB)—

Safety ratio (prog/LBB)—

LBBAP Capture Surveillance ▍

Threshold divergence & margin to programmed output

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Session log