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Coronary Artery DiseasePUDENDAL-NIRSNCT07856199

Pudendal Atherosclerosis by IVUS-NIRS in Men With Coronary Artery Disease

A study testing Selective Pudendal Angiography and Pudendal IVUS-NIRS Imaging in people with Coronary Artery Disease and Erectile Dysfunction, run by Hospital Central Militar at 1 site in Mexico.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This prospective, single-center, exploratory study will evaluate the association between atherosclerotic and lipid plaque burden in the internal pudendal arteries, assessed by intravascular ultrasound and near-infrared spectroscopy (IVUS-NIRS), and the severity of erectile dysfunction in adult men with documented or… Read more about this study

Who is it for?
Ages 18 years and older, men only
What is being tested?
Selective Pudendal Angiography and Pudendal IVUS-NIRS Imaging
Could I receive a placebo?
No, everyone receives an active treatment
How many people
60 participants
Where
1 siteMexico
Study dates
24 Sep 2026to Dec 2027
Phase
Interventional
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • Men only
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Male participants aged 18 years or older.
  • Documented or suspected coronary artery disease with a clinical indication for coronary angiography.
  • Coronary IVUS-NIRS evaluation indicated by the treating interventional cardiologist.
  • Sufficient clinical and hemodynamic stability to undergo the additional pudendal evaluation.
  • Favorable pelvic vascular anatomy for selective angiography and safe advancement of the IVUS-NIRS catheter.
  • Ability to complete the IIEF-5 questionnaire and provide information regarding sexual function.
  • Written informed consent specifically for study participation and invasive evaluation of the internal pudendal arteries.
  • Agreement to clinical follow-up by Cardiology and Urology.

Who cannot join

  • Cardiogenic shock, hemodynamic instability, or acute clinical deterioration.
  • Urgent or complicated coronary procedure in which prolonging the procedure would increase risk.
  • Advanced kidney disease or high risk of kidney injury associated with additional contrast administration.
  • Unfavorable iliofemoral or pelvic vascular anatomy for safe evaluation of the internal pudendal arteries.
  • Severe coagulopathy, active bleeding, or contraindication to the invasive procedure.
  • History of radical pelvic surgery or pelvic radiotherapy.
Show all 10Show fewer
  • Advanced prostate cancer or previous urologic treatment that predominantly explains erectile dysfunction.
  • Severe untreated hypogonadism, advanced neurologic disease, or another predominant nonvascular cause of erectile dysfunction.
  • Inability to reliably complete the IIEF-5 questionnaire.
  • Refusal to participate or to provide study-specific written informed consent.

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

José Raúl Méndez Colin, MD contact

+52 55 2516 3465

dr.mendezcolin1989@gmail.com

Luis Enrique Berumen Domínguez, MD contact

+52 55 2122 1100 ext. 5028

luisberumen@hotmail.com

Mexico1 site, 1 recruiting
  • Hospital Central Militar

    Mexico City, Mexico City, 11200

    José Raúl Méndez Colin, MD, +52 55 2516 3465, dr.mendezcolin1989@gmail.com

    Luis Enrique Berumen Domínguez, MD, luisberumen@hotmail.com

    Recruiting

Other trials in Mexico

About this study

Official title: Characterization of Internal Pudendal Atherosclerosis by Intravascular Ultrasound and Near-Infrared Spectroscopy and Its Relationship With Erectile Dysfunction in Men With Coronary Artery Disease

This prospective, single-center, exploratory study will evaluate the association between atherosclerotic and lipid plaque burden in the internal pudendal arteries, assessed by intravascular ultrasound and near-infrared spectroscopy (IVUS-NIRS), and the severity of erectile dysfunction in adult men with documented or suspected coronary artery disease undergoing clinically indicated coronary angiography.

After completion of the clinically indicated coronary procedure, eligible and hemodynamically stable participants with favorable pelvic vascular anatomy will undergo selective pudendal angiography and investigational IVUS-NIRS imaging of one or both internal pudendal arteries. Erectile function will subsequently be assessed within 30 days using the 5-item International Index of Erectile Function (IIEF-5).

The primary outcome will be the correlation between pudendal maxLCBI4mm and IIEF-5 score. Secondary analyses will characterize pudendal and coronary plaque burden, assess the relationship between pudendal and coronary lipid burden, evaluate associations with cardiovascular risk factors, and describe the technical feasibility and safety of pudendal IVUS-NIRS imaging.

Being tested
Selective Pudendal Angiography, Pudendal IVUS-NIRS Imaging
Keywords
Internal Pudendal Artery, Intravascular Ultrasound, Near-Infrared Spectroscopy, IVUS-NIRS, Lipid Core Burden Index, maxLCBI4mm, IIEF-5
Medical subject headings
Coronary Artery Disease, Erectile Dysfunction, Atherosclerosis

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Selective Pudendal AngiographyProcedure or surgery

    Selective angiography of the internal iliac and internal pudendal arteries will be performed after completion of the clinically indicated coronary procedure to assess pelvic vascular anatomy and technical feasibility for intravascular imaging.

  • Pudendal IVUS-NIRS ImagingDevice

    When vascular anatomy and clinical conditions are considered suitable, an IVUS-NIRS catheter will be advanced into one or both internal pudendal arteries. Automated pullback imaging will be performed to assess vessel anatomy, plaque burden, lipid core burden index (LCBI), and maxLCBI4mm.

Study groups in NCT07856199
Study groupRoleWhat they receive
Pudendal IVUS-NIRS EvaluationExperimentalParticipants will undergo selective angiography of the internal iliac and internal pudendal arteries followed, when technically feasible and clinically safe, by investigational IVUS-NIRS imaging of one or both internal pudendal arteries.
Receives: Procedure: Selective Pudendal Angiography; Device: Pudendal IVUS-NIRS Imaging

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Correlation Between Pudendal maxLCBI4mm and IIEF-5 Score

    The association between the maximum lipid core burden index within a 4-mm segment (maxLCBI4mm) of the internal pudendal arteries, measured by IVUS-NIRS, and erectile function assessed by the 5-item International Index of Erectile Function (IIEF-5) will be evaluated using Spearman correlation. Pudendal maxLCBI4mm ranges from 0 to 1000, with higher values indicating greater lipid burden. IIEF-5 scores range from 5 to 25, with lower scores indicating more severe erectile dysfunction.

    Measured: At the pudendal IVUS-NIRS procedure and within 30 days after enrollment for IIEF-5 assessment

Secondary outcomes (7)
  1. Pudendal Artery Plaque Burden by IVUS

    Pudendal artery plaque burden will be quantified by intravascular ultrasound (IVUS) as the proportion of the vessel area occupied by plaque plus media. Measurements will include plaque burden, minimum lumen area, and angiographic percent stenosis in the evaluated internal pudendal arteries.

    Measured: During the pudendal IVUS-NIRS procedure

  2. Pudendal Artery Lipid Burden by NIRS

    Lipid burden in the internal pudendal arteries will be characterized using near-infrared spectroscopy (NIRS), including the Lipid Core Burden Index (LCBI) and maximum LCBI within any continuous 4-mm segment (maxLCBI4mm). If both internal pudendal arteries are evaluated, measurements from each side will be recorded and the highest maxLCBI4mm per participant will be used for the main analyses.

    Measured: During the index pudendal IVUS-NIRS procedure

  3. Correlation Between Pudendal and Coronary maxLCBI4mm

    The association between pudendal and coronary lipid burden will be assessed by correlating the highest pudendal maxLCBI4mm with the highest coronary maxLCBI4mm obtained by IVUS-NIRS. The correlation will be evaluated using Spearman correlation.

    Measured: During the index coronary and pudendal IVUS-NIRS procedures

  4. Pudendal Atherosclerotic and Lipid Burden According to Erectile Dysfunction Severity

    Pudendal atherosclerotic and lipid burden, including plaque burden and maxLCBI4mm, will be compared across erectile dysfunction severity categories defined by the IIEF-5 score: no erectile dysfunction, mild, mild-to-moderate, moderate, and severe erectile dysfunction.

    Measured: Within 30 days after enrollment

  5. Spearman Correlation Between Pudendal maxLCBI4mm and LDL Cholesterol

    Spearman's rank correlation coefficient (rho) will be calculated between pudendal maxLCBI4mm measured by near-infrared spectroscopy (NIRS) and serum low-density lipoprotein cholesterol (LDL-C). Pudendal maxLCBI4mm is expressed as an index from 0 to 1000, with higher values indicating greater lipid burden. LDL-C is expressed in mg/dL.

    Measured: At baseline

  6. Number of Participants With Successful Pudendal IVUS-NIRS Image Acquisition

    The number of participants in whom analyzable IVUS-NIRS images are successfully obtained from at least one internal pudendal artery will be reported. Successful image acquisition is defined as acquisition of images of sufficient quality for quantitative IVUS and NIRS analysis.

    Measured: Periprocedural

  7. Procedure-Related Adverse Events

    Adverse events related to selective pudendal angiography and IVUS-NIRS imaging will be recorded, including arterial dissection, perforation, persistent vasospasm, thrombosis, bleeding, contrast-associated kidney injury, embolization, or other complications considered attributable to the investigational pudendal procedure.

    Measured: From the pudendal procedure through the 30-day study evaluation

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted2 Oct 2026
  2. Study start24 Sep 2026
  3. Primary completionDec 2027 (estimated)
  4. Study completionDec 2027 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Diagnosis
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
60 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07856199
Sponsor's protocol ID
HCM-PUDENDAL-NIRS-2026
Acronym
PUDENDAL-NIRS
Status last verified
Sep 2026
First submitted
25 Sep 2026
Last updated
2 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: Individual participant data (IPD) will not be shared because the study protocol and informed consent do not include a plan for external sharing of participant-level data. Study data will remain under institutional custody and will be used for the approved research objectives, analyses, and scientific publications while maintaining participant confidentiality.

Publications

  • Montorsi P, Ravagnani PM, Galli S, Rotatori F, Veglia F, Briganti A, Salonia A, Deho F, Rigatti P, Montorsi F, Fiorentini C. Association between erectile dysfunction and coronary artery disease. Role of coronary clinical presentation and extent of coronary vessels involvement: the COBRA trial. Eur Heart J. 2006 Nov;27(22):2632-9. doi: 10.1093/eurheartj/ehl142. Epub 2006 Jul 19.

    PubMed 16854949
  • Rosen RC, Cappelleri JC, Smith MD, Lipsky J, Pena BM. Development and evaluation of an abridged, 5-item version of the International Index of Erectile Function (IIEF-5) as a diagnostic tool for erectile dysfunction. Int J Impot Res. 1999 Dec;11(6):319-26. doi: 10.1038/sj.ijir.3900472.

    PubMed 10637462
  • Erlinge D, Maehara A, Ben-Yehuda O, Botker HE, Maeng M, Kjoller-Hansen L, Engstrom T, Matsumura M, Crowley A, Dressler O, Mintz GS, Frobert O, Persson J, Wiseth R, Larsen AI, Okkels Jensen L, Nordrehaug JE, Bleie O, Omerovic E, Held C, James SK, Ali ZA, Muller JE, Stone GW; PROSPECT II Investigators. Identification of vulnerable plaques and patients by intracoronary near-infrared spectroscopy and ultrasound (PROSPECT II): a prospective natural history study. Lancet. 2021 Mar 13;397(10278):985-995. doi: 10.1016/S0140-6736(21)00249-X.

    PubMed 33714389
  • Waksman R, Di Mario C, Torguson R, Ali ZA, Singh V, Skinner WH, Artis AK, Cate TT, Powers E, Kim C, Regar E, Wong SC, Lewis S, Wykrzykowska J, Dube S, Kazziha S, van der Ent M, Shah P, Craig PE, Zou Q, Kolm P, Brewer HB, Garcia-Garcia HM; LRP Investigators. Identification of patients and plaques vulnerable to future coronary events with near-infrared spectroscopy intravascular ultrasound imaging: a prospective, cohort study. Lancet. 2019 Nov 2;394(10209):1629-1637. doi: 10.1016/S0140-6736(19)31794-5. Epub 2019 Sep 27.

    PubMed 31570255
  • Zacharias SK, Safian RD, Madder RD, Hanson ID, Pica MC, Smith JL, Goldstein JA, Abbas AE. Invasive evaluation of plaque morphology of symptomatic superficial femoral artery stenoses using combined near-infrared spectroscopy and intravascular ultrasound. Vasc Med. 2016 Aug;21(4):337-44. doi: 10.1177/1358863X16631420. Epub 2016 Mar 8.

    PubMed 26957574
  • Rogers JH, Karimi H, Kao J, Link D, Javidan J, Yamasaki DS, Dolan M, Laird JR, Low RI. Internal pudendal artery stenoses and erectile dysfunction: correlation with angiographic coronary artery disease. Catheter Cardiovasc Interv. 2010 Nov 15;76(6):882-7. doi: 10.1002/ccd.22646. Epub 2010 Oct 6.

    PubMed 20928837
  • Park HW, Her SH, Park BH, Han DS, Yuk SM, Kim DW, Youn CS, Jang H. Correlation between internal pudendal artery stenosis and erectile dysfunction in patients with suspected coronary artery disease. PLoS One. 2019 Nov 12;14(11):e0225179. doi: 10.1371/journal.pone.0225179. eCollection 2019.

    PubMed 31714923

Questions about this trial

What is this clinical trial studying?

A study testing Selective Pudendal Angiography and Pudendal IVUS-NIRS Imaging in people with Coronary Artery Disease and Erectile Dysfunction, run by Hospital Central Militar at 1 site in Mexico.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 8 inclusion and 10 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 2 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Mexico. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact José Raúl Méndez Colin, MD (+52 55 2516 3465, dr.mendezcolin1989@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Correlation Between Pudendal maxLCBI4mm and IIEF-5 Score (time frame: At the pudendal IVUS-NIRS procedure and within 30 days after enrollment for IIEF-5 assessment). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT07856199, which also lists 7 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Oct 2026; AzTrials last refreshed its copy on 26 Oct 2026.

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