Learning targeted IAS puncture in 20 minutes
The main reason for all those jitters, we cardiologists, get every time we puncture the IAS is not due to a lack of expertise and experience perse. There are two more reasons. First and foremost, it is still largely a blind* procedure. (Even in this era, where drones with HD vision shoot one-meter targets from a 1000 KM range ) *TEE and ICE are there, but they rarely give enough confidence.
The second reason is more important and is rectifiable. It is the perception error in our anatomical cognition, that is fed to us from first-year medical school. We are made to believe (at least to people like me ) The right atrium is aligned like a perfect box on the right side, sharing a wall called IAS, and the left atrium is obediently placed left of the right atrium. Please realize the heart is such a complex twisted single tubular organ, the venous end, in a stunning backward loop brings the LA most superior and posterior to the right atrium overriding the left-right relationship.)
The right atrial terrain and IAS with multiple bumps and holes. Note the true IAS constitutes only 20% . This is where our punctures need to be.
Development of IAS
IAS development and the number of layers it sandwiches, the tortuous tracts of PFOs, the fossas, and its variable limbus is a big topic. Further, It is worth recalling, the true IAS hardly forms 20 % of the area of the interatrial contact surface.
(the differential regression of sinus venous, along with infoldi...
Source: Dr.S.Venkatesan MD - Category: Cardiology Authors: dr s venkatesan Tags: Anatomy of heart Uncategorized ias puncture right vs left atrial anatomy Source Type: blogs
More News: Anatomy | Cardiology | Eyes | Heart | Learning | South Korea Health | Universities & Medical Training