5.4 Left Ventriculography & Aortography
Key Takeaways
- Left ventriculography assesses LV ejection fraction, wall motion, and mitral regurgitation severity using a pigtail catheter positioned in the LV body
- Standard LV contrast injection uses 30–45 mL of contrast over 10–15 mL/s via power injector or hand injection depending on LV size
- Aortography evaluates aortic regurgitation, aneurysm, dissection, and valve morphology with pigtail placement in the ascending aorta or aortic root
- Mitral regurgitation severity on ventriculography is graded by contrast reflux into the LA: 1+ faint, 2+ fills LA partially, 3+ fills entire LA, 4+ refluxes into pulmonary veins
- Total contrast load must be tracked across coronary, LV, and aortic injections; ventriculography risks include arrhythmia, LV thrombus embolization, and hemodynamic decompensation
While selective coronary angiography maps the epicardial vessels, left ventriculography and aortography answer questions about pump function, wall motion, and valvular competence. These injections use larger contrast volumes and carry distinct arrhythmia and hemodynamic risks. RCIS technologists must prepare the power injector, confirm catheter position, and monitor the patient closely throughout each shot.
Left Ventriculography
Purpose
Left ventriculography provides:
- LV ejection fraction (LVEF) estimation
- Regional wall motion assessment (hypokinesis, akinesis, dyskinesis, aneurysm)
- Mitral regurgitation (MR) severity by contrast reflux into the left atrium
- Intracardiac mass or thrombus detection (contrast filling defects)
- VSD identification in post-MI mechanical complications
Ventriculography is performed when echocardiography is inconclusive, when MR severity must be quantified invasively, or when wall motion must be correlated with coronary findings in the same session.
Catheter and Positioning
The pigtail catheter is advanced across the aortic valve into the mid-LV cavity—typically away from the apex (to avoid ectopy) and away from the mitral apparatus (to avoid artifact). Position is confirmed in both LAO and RAO projections before injection.
Alternative: multipurpose (MP) catheter for ventriculography in some labs, though pigtail remains standard.
Injection Technique
| Parameter | Typical Range | Notes |
|---|---|---|
| Contrast volume | 30–45 mL | Reduce in small LV or renal impairment |
| Injection rate | 10–15 mL/s | Power injector preferred for consistent opacification |
| Projection | RAO 30° common | Shows LV cavity and MR reflux profile |
| Breath hold | End-expiration or end-inspiration per lab | Reduces motion artifact |
Adequate opacification requires dense contrast in the LV cavity during systole. Suboptimal positioning (apical placement, mitral chordae contact) produces incomplete fills and inaccurate EF estimation.
Wall Motion Scoring
Wall motion is graded by segment (17-segment model correlates with coronary territories):
| Grade | Description |
|---|---|
| Normal | Symmetric thickening and contraction |
| Hypokinesis | Reduced contraction |
| Akinesis | Absent contraction |
| Dyskinesis | Outward paradoxical motion (aneurysm) |
Correlate anterior/apical akinesis with LAD disease, lateral with LCx, and inferior with RCA/PDA territory.
Mitral Regurgitation Grading on Ventriculography
| Grade | Angiographic Finding |
|---|---|
| 1+ (mild) | Faint LA opacification; clears with each beat |
| 2+ (moderate) | LA opacification that does not fill entire chamber |
| 3+ (moderate-severe) | Complete LA opacification equal to LV density |
| 4+ (severe) | LA opacification with reflux into pulmonary veins |
Ventriculographic MR grading is semi-quantitative; echocardiography and hemodynamics (large V wave on wedge tracing) provide complementary data.
Aortography
Purpose
Aortography evaluates:
- Aortic regurgitation (AR) severity
- Aortic root and ascending aorta dimensions
- Aortic aneurysm and dissection
- Aortic valve morphology (bicuspid, stenosis concomitant assessment)
- Coronary ostia relationship to sinuses (before TAVR or root surgery)
Catheter and Positioning
The pigtail catheter is positioned in the ascending aorta or aortic root, just above the valve. For root shots, the tip sits below the sinotubular junction; for ascending aortography, the tip is higher to include the tubular aorta.
Injection Technique
| Parameter | Typical Range | Notes |
|---|---|---|
| Contrast volume | 40–60 mL | Larger volumes for aneurysm run-off |
| Injection rate | 15–20 mL/s | Rapid fill needed to see AR during diastole |
| Projection | LAO 45–60° or RAO | Opens aortic root; valve profile visible |
Aortic Regurgitation Grading on Aortography
| Grade | Angiographic Finding |
|---|---|
| 1+ (mild) | Faint LV opacification; clears each cycle |
| 2+ (moderate) | LV opacification that clears slowly |
| 3+ (moderate-severe) | Dense LV opacification equal to aortic root |
| 4+ (severe) | Complete LV opacification with reflux lasting throughout diastole |
Combined with hemodynamics, a wide pulse pressure and low diastolic pressure support severe AR.
Contrast Management
Total contrast exposure accumulates across the case:
| Procedure Component | Approximate Volume |
|---|---|
| LCA angiography | 6–12 mL per injection × multiple views |
| RCA angiography | 4–8 mL per injection × multiple views |
| LV ventriculography | 30–45 mL |
| Aortography | 40–60 mL |
Track cumulative contrast volume, especially when eGFR is reduced. Standard prophylaxis includes IV hydration per protocol, minimizing unnecessary injections, and coordinating with the physician on whether ventriculography can be deferred to echocardiography.
Complications and RCIS Monitoring
| Complication | Mechanism | RCIS Response |
|---|---|---|
| Ventricular arrhythmia (PVCs, VT) | Contrast irritates endocardium; apical catheter contact | Notify physician; prepare antiarrhythmics per protocol |
| Hypotension | Contrast-induced vasodilation, MR/AR hemodynamic burden | Monitor BP; IV fluids; pressors if ordered |
| Thrombus embolization | Contrast dislodges apical thrombus | Avoid aggressive apical positioning; maintain awareness in anterior MI patients |
| Contrast reaction | Anaphylactoid response | Stop injection; airway and epinephrine per ACLS |
| Complete heart block | Rare during deep catheter manipulation in AV node territory | Temporary pacing readiness |
After ventriculography, watch for delayed hypotension and tachycardia from contrast load. Document LVEF estimate, wall motion abnormalities, MR/AR grade, and total contrast volume in the procedure record.
When to Skip or Limit Ventriculography
Ventriculography may be omitted or minimized when:
- Recent high-quality echocardiography provides EF and MR data
- Renal function is severely impaired
- LV thrombus is suspected (risk of embolization)
- Patient is hemodynamically unstable
The RCIS role includes having this equipment ready when ordered while supporting contrast-sparing decisions when the physician defers the shot.
Which catheter is the standard choice for left ventriculography during diagnostic cardiac catheterization?
On left ventriculography, contrast that completely opacifies the left atrium with density equal to the LV and refluxes into the pulmonary veins indicates mitral regurgitation of what severity?
A typical power-injector contrast injection for left ventriculography uses approximately which volume and rate?