FIGURE LEGENDS
Figure 1: Description of flow of events leading to triggering
of RNRVAS
Figure 2: Recordings demonstrating commencement of RNRVAS
during atrial threshold test with loss of atrial capture. Red arrow
points to where atrial capture is lost and RNRVAS starts. Red stars
point to atrial threshold test end and RNRVAS terminated.
2 A: Recording from St Jude Medical device showing from top to
bottom: (1) DII surface ECG (2) Marker channel and intervals (3) Atrial
EGM (4) Near field ventricular EGM (5) Far field ventricular EGM.
Recording sweep Speed 12,5 mm/s.
2 B: Recording from Medtronic device showing from top to
bottom: (1) DII surface ECG with markers (2) Atrial EGM (3) Ventricular
EGM. Recording sweep Speed 25 mm/s.
2 C: Recording from LivaNova - Sorin device showing from top to
bottom: (1) DII surface ECG (2) Atrial EGM (3) Marker channel. Recording
sweep Speed 25 mm/s.
2 D: Recording from Boston Scientific device showing from top
to bottom: (1) D3 surface ECG (2) Atrial EGM (3) Near field ventricular
EGM (4) Far field ventricular EGM (5) Marker channel and intervals.
Recording sweep Speed 25 mm/s
RNRVAS: repetitive nonreentrant ventriculoatrial synchrony, AP: Atrial
pace, AS: Atrial sense, VS: ventricular sense, VP: ventricular pace, Ab:
Atrial activity in Post ventricular atrial blanking period, AR: Atrial
activity sensed in PVARP, BV: Biventriküler pace, Ar: atrial activity
sensed in PVARP, bV: Biventriküler pace, PAC: Premature atrial
contraction, RVS: Right ventricular sense, RVP: Right ventricular pace,
LVS: Left ventricular sens, LVP: Left ventricular pace
Figure 3: Recordings demonstrating commencement of RNRVAS and
ELT during atrial threshold test with loss of atrial capture. Red arrow
points to where atrial capture is lost and RNRVAS starts. Red stars
point to atrial threshold test end and RNRVAS terminated and ELT
started.
Recording from St Jude Medical device showing from top to bottom: (1) D1
surface ECG (2) Marker channel and intervals (3) D2 surface ECG (4)
Atrial EGM. Recording sweep Speed 12,5 mm/s.
RNRVAS: repetitive nonreentrant ventriculoatrial synchrony, ELT: Endless
loop tachycardia, AP: Atrial pace, AS: Atrial sens, VS: ventricular
sens, VP: ventricular pace
Figure 4: Recording from a patient who was in RNRVAS when his
pacemaker was interrogated during routine pacemaker control.
Recording from St Jude Medical device showing from top to bottom: (1)
DII surface ECG (2) Marker channel and intervals (3) Ventricular EGM (4)
Atrial EGM. Recording sweep Speed 25 mm/s.
RNRVAS: repetitive nonreentrant ventriculoatrial synchrony, AP: Atrial
pace, AR: Atrial activity sensed in PVARP, VP: Ventricular pace
Figure 5: Recordings demonstrating commencement of RNRVAS
during loss of atrial capture. 5A: Development of RNRVAS with
loss of atrial capture, 5B: Activation of SIR response with
loss of atrial capture and the start of RNRVAS. Red arrow points to
where atrial capture is lost. Red stars point to SIR response.
Recording from St Jude Medical device showing from top to bottom: (1)
DII surface ECG (2) Marker channel and intervals (3) Ventricular EGM (4)
Atrial EGM. Recording sweep Speed 25 mm/s.
RNRVAS: repetitive nonreentrant ventriculoatrial synchrony, SIR: Sensor
– indicated rate, AP: Atrial pace, AR: Atrial activity sensed in PVARP,
VS: ventricular sens, VP: Ventricular pace