Toby Markowitz

Medtronic retired. ham. cycle. XC ski. invent. fundraise for diabetes. founded WAMXC( in 2000. @[email protected]

[John Mandrola, MD @drjohnm]

Credit to the EP team in Bern for this excellent remapping study after either RF or PFA. Mandated remapping is much better than remapping for symptoms https://t.co/CrxPRG2Ed5

A) PFA no better than RF for durable PVI
B) Recapitulates GAP study showing that AF still occurs in one-third of durably isolated PVs and 72% of those with reconnected veins DID NOT have AF at one year

This is the crux of our problem in EP: we don't understand the pathophysiology of the condition. PVs get isolated because we can. @TobiasReichlin

[Roderick Tung @DrRoderickTung]

Very fitting to have a joint Physiologic Pacing session @APHRSOfficial with @NatRevCardiol in Busan, with #PPS10 in two short weeks.

Our review led by Drs. Lee & Choi @Hisdoc1 @Dr_JozaEP @lusty63 @Marek_Jastrz_EP @MdHuang @HaranBurri @shunmug_his_mdu now online in Nature!

https://t.co/u9az4pcPdC

[John Mandrola, MD @drjohnm]

Remarkable finding

[Kevin Vernooy @kvernooy]

Non-invasive assessment of left atrial activation using lead V8 during Bachmann bundle pacing

https://t.co/oJVKbmfBkY

@Dominik_Linz @Dr_JozaEP @lusty63 @Hisdoc1 @Marek_Jastrz_EP

[Nassir Marrouche @nmarrouche]

Very important message from our group. In patients with recurrent AF after a first ablation, what we do next matters. Repeat catheter ablation was associated with a 35% lower risk of death, stroke, or HF hospitalization compared with cardioversion, with an NNT of only 14.

This challenges the idea that management of recurrent AF should simply be based on operator preference. Recurrence after ablation should not be viewed as failure—it may be an opportunity to intervene again and improve meaningful clinical outcomes.

Congratulations to @mabou_khalil @HanFengGHD @QMarashly and the entire team. #AFib #Ablation #EPeeps
@PrashSanders @shivkumarmd @gautamsand @S_NarayanMD @Phiso_de @drsuneet @drjohnm @drluissaenz @leftbundle @KennethEllenbo1 @DrBradleyKnight @DrRoderickTung @atulverma_md

[Motor1 @Motor1com]

Look I think we all had money on what the first Cybercab accident would be but I don’t think any of us had “hit by 767”

[Adam Cifu @adamcifu]

Is an mRNA vaccine the best way to treat melanoma?
Proudly criticizing Merck, Moderna, Wall Street, the Media, and RFK Jr in under 700 words
https://t.co/1tq7QBt8Hp

[Westby Fisher, MD @doctorwes]

EVERY state needs this! And every hospital needs to follow their lead. 👇 👏👏👏

[Ash Paul @pash22]

Why Has The Antiarrhythmic Drug Well Gone Dry? via @PeterKowey
https://t.co/ChWB6mrt9P

[mariana Z @mariana057]

I'm in search for someone to assist with milking cows on my dairy farm.

Must work well with udders.

[Venkatakrishna Tholakanahalli @VTholakanahalli]

Transcatheter epicardial pacing of the human Bachmann’s bundle via the... https://t.co/sjpCUyB6GQ

[Milan Koštek @KostekMilan]

A lot of us know it but repetition is good.
Also another reason to address factors leading to inappropriate shocks even with more lenient approach used these days
https://t.co/DZNHnRNFlB

[EHJ Editor-in-Chief @ehj_ed]

Endurance exercise is heart-healthy usually. New study shows it can remodel pulmonary vein myocytes and create a pro-arrhythmic atrial substrate. The atrial fibrillation–athlete link, explained. Read more in #EHJ.
https://t.co/sMZoSgBnmd
#AF #athlete #cardiotwitter @ESC_Journals @escardio

[Toby Markowitz @tobymarkowitz]

@TonyKorologos awesome.

[Ash Paul @pash22]

When Sponsors Stop Trials Everyone Loses:
The ANTHEM HFrEF trial of vagal nerve stimulation was proceeding well when the sponsor stopped the trial. The story...and some thoughts about the research enterprise via @drjohnm

[Anish Koka, MD @anish_koka]

Cardiac surgeon @georgetolisjr on @DRsLoungePod

[Heart Rhythm Society @HRSonline]

The keynote everyone's still talking about. 🎤

Dr. Will Flanary, a.k.a. @DGlaucomflecken — ophthalmologist, comedian, and SCA survivor — brought humor, honesty, and a powerful reminder of what it means to be both a doctor and a patient to #HRS2026.

▶️ Watch the full keynote on https://t.co/0BghdRTKLW.

[Toby Markowitz @tobymarkowitz]

@GopherVBall congratulations, graduates. you make us proud.

[Nick Mark MD @nickmmark]

One of my favorite aviation phrases:
“Superior pilots use their superior judgement to avoid having to demonstrate their superior skills.”

It’s true for any proceduralist btw.

[Turbine Traveller @Turbinetraveler]

There is still good left in humanity.

Captain Jon Jackson was supposed to take his final retirement flight with Spirit Airlines today. But after Spirit's shutdown, he instead found himself as a passenger on a Southwest Airlines flight into Baltimore.

What happened next was truly special. Capt. Jackson was honored with a traditional water cannon salute and a surprise welcome celebration at the gate.

This is a powerful reminder that the aviation community is built on respect, compassion, and solidarity—especially when it matters most. Above all, this moment was about honoring a fellow aviator.

Congratulations, Capt. Jackson, and thank you for your years of service in the skies.
Well done Southwest Airlines 💙