ECG post dual chamber pacemaker insertion:

What is an A and V lead switch?
oarahisian pacing: conclusion

What is "no rapidly conducting septal AP"?


What is concealed retrograde penetration?

46M with palpitations:
What is RVOT VT?
52M NYHA III, CRT non-responder. LV lead placed in this vein...

What is the AIV (anterior interventricular vein)?
ICD Shocks, most likely diagnosis:

What is intracardiac (T wave) oversensing?
Mode of induction

What is 2 for 1 response?
over AF pathway and AVN
Entrainment from this site during VT yields this response:

What is an outer-loop site?

Diagnosis:

What is VT?

This structure can make CTI ablation a nightmare...
What is the Eustachian Ridge?
(Enriquez et al. Circulation 2018)
Dual Chamber Pacemaker with Palpitations:

What is repetitive non-reentrant ventricle-atrial synchrony (RNRVAS):

Response to PVC:

What is accessory pathway conduction?
retrograde His follows A

SVT diagnosis:

What is AVRT? PVC at V end of right-sided AP

Mechanism of block:

What is Phase 4 AV block?
Next door to the aortic Non-Coronary cusp
What is RA septum?
Most likely diagnosis:
What is atrial tachycardia?
Parahisian Pacing Diagnosis:
What is atrial capture?

Entrainment with concealed fusion: bystander or in circuit

What is "in circuit"? stim to QRS = egm to QRS

26F with recurrent syncope:

What is vasovagal syncope?
After failing DFT testing, an extra coil was placed in this location:

What is the azygous vein?

Reveal implanted for syncope, on interrogation 1 week post implant:

What is under-sensing / air in the pocket?
(no T wave on last QRS)
A PAC is delivered, by which means does it advance the next beat???

What is the slow pathway?

Induced Tachy: V-V interval changes precede H-H interval changes. Diagnosis:

What is bundle branch reentry VT?
72 year old woman with palpitations.

What is nonreentrant dual A-V nodal tachycardia?
During LV lead implant, these two structures can lead to dissection if not handled gently....
