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cardio.hypertensive-emergency.acute-renovascular-flash-pulm-edema.v1

Acute renovascular flash pulmonary edema (Pickering syndrome)

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Start encounter →Print handoutPRODUCTION

Phase E variant of cardio.hypertensive-emergency.core.v1 — narrowed to acute renovascular flash pulmonary edema (Pickering syndrome). Inherits HTN-emergency framework + sister flash pulm edema variant acute bundle (NIPPV + NTG + IV loop per 3CPO PMID 18768944 + DOSE PMID 21366472); specializes for renal-artery etiology (bilateral RAS or unilateral RAS with single functioning kidney) + ACEi/ARB AVOIDANCE in bilateral RAS (precipitous AKI risk = pathognomonic reveal) + revascularization decision per CORAL trial subgroup analyses (PMID 24245566) showing benefit in flash-pulm-edema phenotype + resistant HTN + refractory CHF. FMD vs atherosclerotic etiology differentiation drives revasc approach + surveillance. Manifest pointer reuses cardio.hypertensive-emergency.core.v1 manifest. Design-brief pointer reuses parent (Pickering-specific differences documented inline). Status INTEGRATED until terminology + RxNav-validated drug codes are reconciled. Authored 2026-05-15 by shard-06-cardio-acute as part of HTN emergency Phase E variant batch wave 16.

Entry points (5)

  • vital_abnormality
    Recurrent flash pulmonary edema episodes + resistant HTN despite ≥3 antihypertensives (incl diuretic) — Pickering syndrome screen
    recurrent_flash_pulm_edema_with_resistant_htn
  • history
    AKI (Cr rise >30%) within 1-2 wk of starting ACEi/ARB — pathognomonic for bilateral RAS or unilateral RAS with single functioning kidney
    acei_arb_induced_aki
  • history
    Asymmetric kidney size on prior imaging (>1.5 cm difference) or atrophic kidney — RAS suspicion
    asymmetric_kidney_size_or_atrophic_kidney
  • symptom
    Acute dyspnea + orthopnea + severe HTN + atherosclerotic vascular disease (CAD, PAD, AAA) — atherosclerotic RAS phenotype
    acute_dyspnea_orthopnea_with_severe_htn_and_known_vascular_disease
  • symptom
    Young woman (typically 15-50) with resistant HTN + flash pulm edema episodes — fibromuscular dysplasia (FMD) phenotype
    young_woman_with_resistant_htn_and_flash_edema

Required inputs (14)

  • agerequired
    demographic • used at CONTEXT
    Atherosclerotic RAS typical >55 with vascular disease; FMD typical 15-50, female-predominant; both can present with Pickering syndrome
  • sbprequired
    vital • used at TREATMENT
    Goal SBP ↓ 25% in first hour; preserve perfusion (ACC/AHA 2025); resistant HTN typical baseline
  • spo2required
    vital • used at RED_FLAGS
    O2 + NIPPV titration during flash edema episode; SpO2 <90 on RA typical
  • rrrequired
    vital • used at RED_FLAGS
    RR >25-30 + accessory muscle use → NIPPV; >35 + AMS → consider intubation
  • orthopnea_or_pndrequired
    symptom • used at ENTRY
    Orthopnea + PND classic for cardiogenic flash edema vs ARDS
  • creatininerequired
    lab • used at INITIAL_WORKUP
    Trend critical — ACEi/ARB-induced Cr rise >30% within 1-2 wk = pathognomonic for bilateral RAS; baseline Cr drives revasc decision (CORAL excluded eGFR <30)
  • troponinrequired
    lab • used at INITIAL_WORKUP
    ACS overlap — flash pulm edema may herald MI, especially in atherosclerotic RAS phenotype with concurrent CAD
  • bnp_or_nt_probnp
    lab • used at INITIAL_WORKUP
    BNP >500 LR+ 8.1 for AHF (Maisel NEJM 2002 PMID 12124404); confirms cardiogenic etiology
  • aldosterone_renin_ratio
    lab • used at BRANCHING_WORKUP
    Renin typically high in renovascular HTN; ARR helps differentiate from primary aldosteronism (low renin) — order after acute stabilization
  • cxr_pulmonary_edemarequired
    imaging • used at INITIAL_WORKUP
    Bilateral infiltrates + cephalization confirm cardiogenic edema; baseline cardiomegaly suggests chronic HTN
  • ecgrequired
    imaging • used at INITIAL_WORKUP
    Rule out STEMI overlap; LVH typical in chronic HTN (Pickering patients have decades of HTN)
  • renal_doppler_usrequired
    imaging • used at BRANCHING_WORKUP
    First-line non-invasive RAS screen — peak systolic velocity >180 cm/s + RAR >3.5 (sensitivity ~85%, specificity ~92% per ACR appropriateness criteria); bedside-feasible after acute stabilization
  • cta_or_mra_renal_arteries
    imaging • used at BRANCHING_WORKUP
    CTA preferred for atherosclerotic RAS visualization; MRA if CTA contraindicated (eGFR concern); MRA shows characteristic "string of beads" in FMD
  • echo_post_stabilizationrequired
    imaging • used at MONITORING
    EF + diastolic function (HFpEF common in Pickering — chronic HTN-induced); valvular function (rule out acute MR); LV mass for chronic HTN burden

12-phase flow (10)

  1. 1FRAME
    Pickering syndrome = bilateral RAS (or unilateral RAS with single functioning kidney) + RAAS hyperactivation → severe HTN + recurrent flash pulmonary edema episodes. Acute management: standard flash pulm edema bundle (NTG + IV loop + NIPPV per 3CPO PMID 18768944) WITHOUT ACEi/ARB (precipitous AKI risk). Definitive: renal artery angioplasty/stenting in flash-pulm-edema phenotype per CORAL subgroup analyses (PMID 24245566); FMD → stenting indicated.
    inputs: sbp, spo2, rr, orthopnea_or_pnd
    advance: flash pulm edema phenotype confirmed + Pickering suspicion documented
  2. 2ENTRY
    Acute episode: NIPPV + IV NTG + IV loop diuretic; recognize Pickering signature (resistant HTN + recurrent flash edema + atherosclerotic vascular disease OR young woman with FMD features)
    inputs: age, sbp, spo2
    advance: NIPPV + IV NTG initiated + Pickering screen flagged
  3. 3CONTEXT
    Chronic HTN history, prior ACEi/ARB intolerance with AKI, atherosclerotic vascular disease (CAD, PAD, AAA, carotid stenosis), CKD, family history of FMD, young female with HTN + headaches/abdominal bruit
    inputs: age
    advance: context complete + RAS suspicion confirmed
  4. 4RED_FLAGS
    Refractory hypoxemia despite NIPPV → intubation; ACS overlap (positive troponin, ST↑) → cath lab; cardiogenic shock SCAI C+ → ICU + MCS; recurrent flash edema episodes (≥3/yr) → revascularization workup expedited; ACEi/ARB-induced AKI → STAT renal artery imaging
    inputs: spo2, rr, sbp, troponin, creatinine
    actions: htn_emergency
    advance: red flags screened + escalation plan documented
  5. 5INITIAL_WORKUP
    BMP (Cr trend critical), troponin, BNP/NT-proBNP, ECG, CXR, lung US, ABG; bedside echo for EF/diastolic; renal Doppler US after acute stabilization (peak systolic velocity >180 cm/s + RAR >3.5)
    inputs: creatinine, troponin, cxr_pulmonary_edema, ecg
    actions: panel.cardiac, panel.renal
    advance: workup documented + RAS imaging plan made
  6. 6BRANCHING_WORKUP
    Atherosclerotic RAS (older + vascular disease) vs FMD (younger women, "string of beads" on MRA) vs Takayasu arteritis (younger Asian women, ESR↑, large-vessel involvement); aldosterone-renin ratio after acute phase to differentiate from primary aldosteronism; CTA/MRA for definitive anatomy + revascularization planning
    inputs: renal_doppler_us, cta_or_mra_renal_arteries, aldosterone_renin_ratio
    advance: etiology classified + revascularization candidacy assessed
  7. 7TREATMENT
    ACUTE: IV NTG 5-200 µg/min (preload + afterload) + IV furosemide 40-80 mg per DOSE PMID 21366472 + NIPPV per 3CPO PMID 18768944. CHRONIC management: CCB (amlodipine, nifedipine ER) safe in any RAS; diuretic + minoxidil if resistant; AVOID ACEi/ARB in BILATERAL RAS or unilateral RAS with single functioning kidney (precipitous AKI risk per pathophysiology); ACEi/ARB OK in unilateral RAS with normal contralateral kidney + close monitoring. Definitive: revascularization per CORAL subgroup analyses suggests benefit in flash-pulm-edema phenotype; FMD → angioplasty (often without stent, durable response); atherosclerotic → stenting if anatomically suitable + flash edema phenotype.
    inputs: sbp, spo2, creatinine
    advance: BP at target + oxygenation improved + UOP responding + revasc decision plan
  8. 8DISPOSITION
    ICU for HTN emergency + flash edema; CCU/cardiology floor if rapid response to NIPPV/NTG; cath lab if ACS overlap; vascular surgery / interventional cardiology consult for revasc planning if flash edema phenotype
    advance: unit assigned + revasc workup booked
  9. 9MONITORING
    Arterial line + q5-15 min BP; continuous SpO2 + ECG; hourly UOP; serial troponin q6h × 3; BMP q6h (especially if any RAAS modulation tried); daily weight + I/O; echo at 24-48h; pre-revasc anatomy CTA/MRA review
    inputs: sbp, creatinine, spo2
    actions: panel.renal
    advance: BP at target + oxygenation stable + diuresis adequate + revasc planning underway
  10. 10FOLLOWUP
    Outpatient: revascularization decision (vascular surgery + IR + nephrology multidisciplinary); long-term BP control with CCB-based regimen + diuretic ± minoxidil + ARB cautious trial post-revasc if anatomy permits; statin + ASA for atherosclerotic RAS (secondary prevention); FMD: lifelong surveillance for vascular FMD elsewhere (cervicocephalic, mesenteric); 1-week follow-up; cardiac rehab if first HF episode
    advance: revasc decision finalized + chronic regimen + 1-wk follow-up booked