Miami Minimally Invasive Valves
Joseph Lamelas, MD
Dedicated to the Advancement of Minimally Invasive Cardiac Surgery

Posts tagged as circulatory arrest

In some minimally invasive cases where the ascending aorta is replaced at the level of the STJ and the AV is sparred (not a David procedure, a supra-coronary replacement), I find it valuable to use 2 separate grafts. One segment of graft is initially anastomosed to the hemi -arch or the distal ascending aorta and the other segment of graft to the STJ.  These are then beveled and sewn together.  This 2 graft technique is especially helpful if the proximal anastomosis ( STJ) is far away.

 The technique that I have used to suture this proximal anastomosis entails inverting the proximal graft into the root and suturing it with a running suture. Once complete the small segment of graft is pulled from the root and there is a very hemostatic closure. The pictures below demonstrate the technique.


Along my journey to constantly try to modify, simplify and improve all of my minimally invasive approaches, here is another one.

Since I very rarely use retrograde Cardioplegia and have gone to a one shot Modified Del Nido solution (4 parts Blood: 1 part Del Nido with 40 mEq of potassium, with a 2 liter induction dose, which allows me for 90-100 minutes of SAFE arrest time), I needed to have a device to retract the right atrial appendage in mini AVR procedures.  I have tried many different devices and maneuvers but placing a number 2 silk inside of an IV tubing and looping it out of one end provides the necessary retraction. The tubing and loop are passed through my chest tube incision or utility port.  My LV vent which is placed into the right superior pulmonary vein is also exited through the utility port. You will also see in the pictures a third tube, which is a long IV tubing (not to be confused with the loop tube) which is used as a guide to help pass all of the above through the utility port and avoid creating multiple false tracts in the chest wall as well as avoid damage to the intercostal vessels.DSCN9025DSCN9029DSCN9038DSCN9036

I have enclosed pictures to demonstrate this.

I have enclosed a link to the Annals of Cardiothoracic Surgery.
I have submitted 4 publications to this journal that I would like for all of you to review.
Two are relevant to Minimally Invasive AVR/MVR, one on Minimally Invasive AVR, and one on Building a Minimally Invasive Valve Program, of which I was a co-author with Dr. Tom Nguyen.
In addition, I think that all of the contributions to this journal are significant and will help advance the subspecialty of minimally invasive valve surgery.
I urge all to subscribe.
There are previous editions of this journal which are excellent and I believe serve as a reference for all Cardiothoracic Surgeons.

As I have mentioned in a previous blog, I have been getting more comfortable with using Del Nido Cardioplegia.

I have enclosed the components that we utilize.

We use a 4:1, blood: cardioplegia ratio

I believe that it has been described using a 1:4 ratio.

I usually deliver a 2 liter induction dose and then I give an additional 500cc , 45-55 minutes later.

I would recommend not giving an additional dose within 20 minutes of unclamping because I have noticed that the heart is a bit more stunned and takes longer to resume electrical activity.

1 liter of Plasmalyte or Isolyte or Normasol

Mannitol 20% 16 mL
Magnesium 2 g 4 mL
KCL 35 mEq
Sodium Bicarbonate 13 mL
Lidocaine 2% 6.5 mL

I usually end up using approximately 2 liters of this cardioplegia because I also utilize this solution to irrigate the aortic root and LV after debriding the calcium or for testing my mitral valve repair.

Enclosed is a link to a 3 minute and 20 second You tube video that demonstrates a mini thoracotomy replacement of the aortic valve , ascending aorta, and hemi arch with re-implantation of the coronaries with a composite Freestyle stentless mini root and hemashield graft under circulatory arrest with retrograde cerebral perfusion. (BTW, this patient is 85 years old and had an uneventful post operative course).

An extended version of this video was accepted to the ISMICS meeting in Boston.  After being accepted as a video presentation, I was informed that all the slots were taken and it would have to be a poster presentation.  It is difficult to convey the message with a poster, but I inserted representative pictures in the poster and provided a link to my blog (and video) so that anyone interested could view it.