Clinical And Research Questions Flashcards
Characterize aortic valve Vmax of 4.9.
Severe high gradient AS.
Generally identified by an aortic jet velocity over ≥4.0 m/s or mean transvalvular pressure gradient ≥40 mmHg.
Characterize an AVA of 0.9 cm2.
aortic valve area (AVA) ≤1.0 cm2 is typically seen but is not required to identify high gradient severe AS (high gradient severe AS, stage D1).
What is an approach to identifying AS patients for valve replacement?
Know: symptoms, hemodynamic severity, LVEF, other indications for heart surgery, procedural risk.
Sx: symptomatic severe AS is a key indication for AVR.
Severity: echo - Vmax ≥4, ΔP ≥40.
LVEF <50.
Concomitant heart surgery: mod AS could get AVR.
In a comorbid patient with severe symptomatic AS, who would be treated with palliative or medical management?
Life expectancy <1 yr or quality of life unlikely to improve.
Pt has STS-PROM >8 with severe AS. What valve intervention would be preferred?
TAVI transfemoral.
For patients with sx severe AS (Vmax ≥4, ΔP ≥40), with intermediate surgical risk (STS-PROM 4-8) in whom transfemoral TAVI is feasible…
AND WITHOUT high risk anatomic features (adverse aortic root, low coronary ostia height, heavily calcified bicuspid AV, and severe LVOT calcification)…
What is recommended?
TAVI transfemoral
Symptomatic severe AS with intermediate surgical risk (ie, STS-PROM 4 to 8), but unable to get transfemoral TAVI. What is recommendation?
SAVR
Sx severe AS w/ low surgical risk (STS-PROM <4)…
AND
1) ≥65 years
2) transfemoral TAVI approach feasible
3) AV is trileaflet
4) no other high risk TAVI anatomy (adverse aortic root, low coronary height, severe LVOT calcification)…
What is recommended?
TAVI transfemoral
What’s the evidence on concurrent MVr and CABG in patients with ischemic/secondary/functional MR?
A randomized trial, as well as some observational studies, found no improvement in symptoms or risk of mortality from the addition of mitral valve surgery to CABG compared with CABG alone. However, Duke Activity Status Index (DASI) was significantly better in the combined procedure group at two years.
Randomized Ischemic Mitral Evaluation (RIME) multicenter randomized trial of 73 patients with MODERATE ischemic MR found that the addition of mitral ANNULOPLASTY to CABG did not affect mortality rates but improved FUNCTIONAL capacity (peak oxygen consumption) and LV reverse remodeling.
The available evidence suggests that for patients with SEVERE ischemic MR, SURVIVAL IS SIMILAR following mitral valve replacement with CHORDAL SPARING TECHNIQUE compared to surgical mitral valve repair. However, recurrent MR is much more frequent following surgical mitral valve repair.
For patients with SEVERE ischemic MR who are undergoing mitral valve surgery, we suggest concurrent BIOPROSTHETIC mitral valve replacement with CHORDAL SPARING technique rather than surgical mitral valve repair. Recurrent MR is much more common after mitral valve repair than after mitral valve replacement.
For patients with nonischemic MR who are undergoing mitral valve surgery, we suggest mitral valve replacement with chordal sparing unless valve anatomy is favorable for surgical mitral valve repair and intraoperative transesophageal echocardiography demonstrates minimal residual MR after repair.
What is the NEJM study showing TAVR vs medical therapy outcomes from 2010?
What did they do? What did it show?
PARTNER trial.
RCT: Severe AS pts unfit for surgery to TAVR vs best medical therapy (including balloon valvuloplasty).
Improved mortality and readmission in TAVR.
What was the PARTNER 2 trial, and what did it show?
- Randomized intermediate risk pts (STS PROM 3-8%) to SAVR vs TAVR.
Rates of death and disabling stroke were similar.
What is the PARTNER 3 trial, and what did it show?
- Observed improved rtes of the composite outcome of death, stroke, or rehospitalization in low risk (STS PROM <3%) patients treated with TAVR.
What is the expected 10-year freedom from structural valve degeneration of bioprosthetic SAVR?
85-99% depending on the valve, patient factors, and definitions of degeneration
What does the ACC/AHA guidelines say about the age for bio vs mech AVR?
<50 mech is preferred.
>65 bio is preferred.
A patient is expected to have a <12 mo life expectancy after TAVR placement. What should be done?
Best medical management.
What are standard hemodynamic targets post heart surgery for CI and MAP?
CI of 2.2
MAP of 65
63F w/ hx of GERD and EGD showing 7cm hiatal hernia, esophagitis, and gastropathy. Demeester on Bravo is 50.8. No alarm symptoms or dysphagia.
What are the next steps?
You could do CT scan and manometry to eval anatomy and swallowing, but a VEG would also allow you to do the same if there aren’t major risk factors for things like scleroderma or extrinsic compression (she has no dysphagia)
Risk factors for APF/PAL?
COPD, female, low FEV1/DLCO, smoking, DM, chronic steroid use, marked pleural adhesions, upper lobe emphysema or diffuse emphysema, increased age, large bullae
When should APF be suspected?
Usually not fatal, so why are they problematic?
PAL on chest tube drainage system >5 days.
Prolonged hospital stay, higher rates of ICU admission, higher morbidity (PNA, empyema, VTE)
What is drainage-dependent air leak?
Why is it significant?
What about drainage-INdependent?
Occurs when there is nonexpandable lung (eg after lung resection) and stops when drainage is discontinued (clamp trial does not worsen ptx). Usually 2/2 mismatch b/w remaning lung parenchyma and thoracic cavity.
Drainage-independent is 2/2 direct visceral pleural injury.
First line management for PAL/APF.
Continued chest tube thoracostomy w/ low or no wall suction. Especially w/ non-expandable lung. It is viable to have a period of high suction if fistula is large (eg secondary spontaneous in COPD from ruptured bullae) in order to facilitate apposition of the visceral and parietal pleura.
DC ETT to reduce positive pressure trans-parenchymal gradient.
Optimize nutrition and perfusion.
Monitor for improvement with time.
If no improvement in 4-5 days, consider VATS.
How do you manage PAL/APF if first line/conservative management fails?
How do you decide vs bronchoscopic valves vs VATS blebectomy and mech/chem pleurodesis vs ambulatory drainage devices?
If possible, eval the size, location, and integrity of the INTERLOBAR FISSURE.
Leaks associated with minimal collateral ventilation between the target lobe and adjacent lobes are better suited to bronchoscopic therapy.
Large leaks associated with significant collateral ventilation might be suited for surgical repair or pleural procedures, depending on clinical status of the patient.
How can you localize air leak in PAL/APF?
How can you eval for fissure completeness?
Sequential balloon occlusion; this can also help eval for fissure completeness - a reduction of airflow >50% indicates a likely response to bronchoscopic mgmt.
High-res CT showing fissure integrity >90% (ie complete fissure) suggests minimal collateral ventilation and suggests bronchoscopic valve management may be beneficial.
In the largest trial of 75 patients with APF and PAL who underwent valve implantation, air leak resolution occurred in 70 percent of patients with a median time to resolution of 16 days. Additional subsequent procedures were needed in 20 percent of patients (eg, Heimlich valve, chemical pleurodesis).
What is needed for chemical pleurodesis to work well in APF/PAL?
direct apposition of the visceral and parietal pleura and thus should only be done if there is a small or no residual pneumothorax when the chest tube is on water seal; autologous blood patch can also directly seal the air leak as well as induce pleural inflammation and pleurodesis
When should ambulatory drainage devices be used?
What are some requirements for discharging a PAL/APF patient home with an ambulatory drainage device?
patients who fail or are not candidates for bronchoscopic or surgical approaches, ambulatory drainage devices and nonsurgical pleural procedures are options
can be discharged home with these devices as long as they are asymptomatic without subcutaneous emphysema or enlarging pneumothorax size
A 50M who works as a driver has a stroke. DVT is confirmed, and TEE shows ASD (ostium secundum 2.3 cm). Manage.
What are your cutoffs for surgery?
Who would not benefit?
General: watch for AF, PH, endocarditis.
Determine if HD significant L-to-R shunt - one causing RA or RV enlargement w/ Qp/Qs ≥1.5:1.
Without significant PH:
*With functional impairment – AND w/ hemodynamically significant net L-R shunt -> ASD closure.
*Without symptoms – AND net L-R shunt, RA or RV enlargement w/ Qp/Qs ≥1.5:1, PASP <50 percent of systemic SBP, PVR < 1/3 of SVVR and no cyanosis at rest or during exercise -> ASD closure.
PVR >5 Wood units - Rx for PAH w/ re-eval of hemodynamics at f/u should be considered.
Net R-L shunt and irreversible PASP > 2/3 systemic, or irreversible PVR > 2/3 of SVR - recommend AGAINST ASD closure.