Radial Artery Occlusion After Transradial Access for Coronary Interventions

Background Transradial access (TRA) is a medical procedure primarily used for percutaneous coronary interventions (PCI) and cardiac catheterization. Based on the recently published Minimizing Adverse Haemorrhagic Events by Transradial Access Site and Systemic Implementation of AngioX (MATRIX) trial, TRA is being used more frequently than transfemoral access (TFA) since it has reduced rates of bleeding and fatality. A structural complication of TRA is radial artery occlusion (RAO), which may cause temporary pain to limit TRA in the future. Objective This study aimed to investigate the onset and risk factors of RAO following TRA for coronary interventions. Material and methods An observational study was conducted at Fauji Foundation Hospital in Peshawar, Pakistan. The study included 1,680 patients recruited between April 2021 to December 2023. Fifty-eight patients were lost to follow-up, while another 95 patients did not come for a visit within the study period. The final study, therefore, included 1,527 patients. Results The mean age of patients was 58.09 ± 8.07 years. Patients were divided into two age groups (greater or less than 60 years). Diagnostic angiograms were completed for 955 patients, while 572 also underwent PCI. The overall RAO onset was 81 (5.3%). There was a significantly higher RAO onset in patients over 60 years old (7.1 vs 3.8%, p = 0.003). Conclusion Overall, the risk of RAO is low following TRA. The risk of RAO is significantly higher in people aged over 60 years.

Radiation exposure during distal and traditional radial coronary angiography and percutaneous coronary intervention: a meta-analysis of randomized controlled trials

OBJECTIVES

Previous studies show that the distal transradial approach (dTRA) is safe and effective for coronary angiography and percutaneous coronary intervention. However, the effect of dTRA on radiation exposure in the catheterization laboratory has not been characterized. The authors analyzed the available literature to compare the radiation exposure associated with dTRA vs the traditional radial approach (TRA).

METHODS

A systematic review and meta-analysis of the scientific literature was conducted by using relevant terms to search the PubMed, Embase, and Cochrane Library databases from their inception until October 13, 2022, to identify randomized controlled trials (RCTs) comparing dTRA with TRA. The primary outcome was radiation exposure reported as fluoroscopy time, air kerma, or kerma-dose product. The standard mean difference (SMD) and its 95% confidence interval were used to summarize continuous variables. Random effect and meta-regression also were used for analyses.

RESULTS

Among 484 studies identified, 7 were RCTs, with a total of 3427 patients (1712 dTRA, 1715 TRA). No difference was found between dTRA and TRA in radiation exposure quantified as fluoroscopy time (SMD -0.10 [-0.36, 0.15], P=.43) or air kerma (SMD -0.31 [-0.74, 0.13], P=.17). The overall estimate favored lower kerma-area product in the TRA (SMD 0.19 [0.08, 0.30], P=.0006). Meta-regression showed no correlation between fluoroscopy time and year of publication.

CONCLUSIONS

Compared with TRA, dTRA was associated with significantly greater radiation exposure per the kerma-area product during interventional cardiology procedures, with no differences in fluoroscopy time and air kerma.

Therapeutic efficacy and complications of radial versus femoral access in endovascular treatment of unruptured intracranial aneurysms

PURPOSE

The transradial approach (TRA) in neuroendovascular treatment is known to have a lower risk of complications than the transfemoral approach (TFA). However, little research has focused on assessments of efficacy and risk of complications in the treatment of intracranial aneurysms. This study aimed to compare the efficacy and complications of TRA and TFA in coil embolization of unruptured intracranial aneurysms (UIAs) at our institution.

METHODS

Consecutive patients who underwent endovascular surgery via TRA or TFA at a single institution from 1 April 2019, to 28 February 2022, were retrospectively analyzed. Patients were classified into TRA and TFA groups and assessed using propensity-adjusted analysis for outcomes including fluoroscopy time, volume embolization ratio (VER), and complications.

RESULTS

A total of 163 consecutive UIAs were treated with coil embolization during the 35-months study period. The incidence of minor access site complications (ASCs) was significantly higher with TFA (20%, 25/126) than with TRA (2.7%, 1/37; p = 0.01). Propensity-adjusted analysis (matched for age, sex, aneurysm volume, embolization technique, and sheath size) revealed that TRA was associated with a lower risk of minor ASCs (odds ratio, 0.085; 95% confidence interval 0.0094-0.78; p = 0.029). However, TRA did not differ significantly from TFA with respect to fluoroscopy time, VER, major ASCs, and non-ASCs.

CONCLUSIONS

Coil embolization for UIAs via TRA can reduce risk of minor ASCs without increasing the risk of non-ASCs compared with conventional TFA, and can achieve comparable results in term of efficacy and fluoroscopy time.

Pseudoaneurysm of radial artery after coronary angiography

Iatrogenic pseudoaneurysms (IPA) are a rare complication of transradial coronary intervention. This brief report aims to present a case report of a radial artery pseudoaneurysm and to review the current management of this entity. Because of the increased performance of transradial coronary intervention, IPA have become more common. Doppler ultrasonography is a fundamental tool to aid the differential diagnosis with other pathologies. There is no consensus on the treatment, which may range from conservative management to surgical repair. Close surveillance after the procedure and early diagnosis are essential to avoid serious complications, such as ischemia of the hand. The management of IPA depends upon morphological characteristics and associated symptoms.

Risk factors for radial artery occlusion after neurointervention for unruptured intracranial aneurysm via transradial access

PURPOSE

Neurointervention via transradial access (TRA) is less invasive than via transfemoral access. However, radial artery occlusion (RAO) may occur with TRA. The purpose of this study was to explore risk factors for RAO after coil embolization of unruptured intracranial aneurysms (UIAs) via TRA.

METHODS

Forty-two consecutive patients who underwent coil embolization for UIAs via TRA between March 2021 and March 2022 and were available for angiographic evaluation 1 year after treatment were retrospectively reviewed. Multivariate logistic regression analysis was conducted to identify potential risk factors for RAO.

RESULTS

Seventeen (40%) of the 42 patients showed RAO. Compared with the non-RAO group, radial artery size was significantly smaller (2.2 mm [interquartile range (IQR): 2.1, 2.4 mm] vs 2.6 mm [IQR: 2.5, 2.7 mm]; p = 0.001) and the incidence of radial artery spasm (RAS) was significantly higher in the RAO group. Multivariate analysis identified radial artery size (odds ratio [OR] 4.9 × 10^-3, 95% confidence interval [CI] 6.4 × 10^-5-0.38) and incidence of RAS (OR 14.8, 95%CI 2.1-105) as significant independent predictors of subsequent RAO. Based on receiver operating characteristic (ROC) curve analysis, the optimal cutoff for radial artery size was 2.5 mm (sensitivity, 82.4%; specificity, 76.0%; area under the ROC curve, 0.80 [95%CI 0.66-0.95]).

CONCLUSION

Radial artery size and RAS represent reliable parameters for predicting RAO 1 year after coil embolization for UIA via TRA. Prophylaxis against RAS and limiting neurointervention via TRA to patients with radial artery larger than 2.5 mm in diameter may reduce the risk of postoperative RAO.

Comparing the Safety and Feasibility of Endovascular Therapy via Transradial and Transfemoral Approaches in Patients with Aortoiliac Occlusive Disease: A Propensity Score-Matched Analysis of the Nationwide Registry

PURPOSE

Our objective was to evaluate the feasibility of performing endovascular therapy (EVT) for aortoiliac artery disease using transradial approach (TRA) as compared to transfemoral approach (TFA).

METHODS

We analyzed 9671 cases with symptomatic lower extremity artery disease due to aortoiliac occlusive disease (AIOD) treated using EVT from a Japanese Nationwide EVT Registry between January and December 2021. We compared the baseline characteristics, procedural information, and 30-day outcomes of patients who received EVT only via TRA (n=863 [16.9%]) and those only via TFA (n=4255 [83.1%]) by using propensity score (PS) matching, after excluding those who required regular dialysis, those who underwent hybrid surgeries, and those who received EVT through 2 or more approach sites.

RESULTS

After matching, the final study population consisted of 862 matched patients with similar baseline characteristics in each group. Technical success rate was comparable between the 2 groups (99.3% vs. 99.3%, p>0.99). No significant differences were observed with respect to the composite of all-cause death within 48 hours after EVT and post-procedural complications within 30 days, including severe bleeding that required transfusion, revascularization procedures, urgent surgeries, cerebral infarction, and major limb amputation (0.2% vs. 0.7%, p=0.29). Transradial approach was associated with shorter operation time (85 vs. 90 minutes, p=0.016), but longer fluoroscopy time (26 vs. 20 minutes, p<0.001) and higher contrast agent volume (80 vs. 75 mL, p<0.001).

CONCLUSION

After PS matching, TRA showed the comparable rates of successful EVT and 30-day complications in patients with AIOD compared to TFA. Transradial approach was found to be safe and be a viable alternative of TFA for the treatment of AIOD.

CLINICAL IMPACT

The efficacy of transradial approach (TRA) is established in percutaneous coronary intervention; however, its safety and feasibility are unclear in endovascular therapy (EVT). We analyzed 9,671 cases with symptomatic aortoiliac occlusive disease treated using EVT from a Nationwide Registry to compare the 30-day outcomes of those who received EVT only via TRA (n = 863 [16.9%]and those only via TFA (n=4,255 [83.1%]) by using propensity score matching. Technical success rate (99.3% vs. 99.3%, p > 0.99) and 30-day complications (0.2% vs. 0.7%, p = 0.29) were comparable between the two groups. EVT via TRA could be performed safely.

Is the transradial approach associated with decreased acute kidney injury following percutaneous coronary intervention in patients not complicated by major bleeding and haemodynamic disturbance?

BACKGROUND

The impact of the transradial approach (TRA) on the development of acute kidney injury (AKI) after percutaneous coronary interventions (PCI) has been controversial.

METHODS

We retrospectively analysed 463 patients undergoing PCI for either acute or chronic coronary syndrome. Excluded patients were those with missing laboratory or procedural data, acute/decompensated heart failure, major bleeding, haemodynamic instability, long-term dialysis and mortality. The primary endpoint of the study was the incidence of AKI after PCI, which was defined as an increase in serum creatinine (SCr) level of 0.5 mg/dl or 25% from the baseline. Secondary endpoints were change in SCr level, increase in SCr of ≥ 0.3 and ≥ 0.5 mg/dl, and increase in SCr of ≥ 25 and ≥ 50%. We compared the incidence of AKI between the TRA and the transfemoral approach (TFA) in the overall and a propensity score (PS)-matched study population.

RESULTS

The study population included 339 patients. After PS matching, we obtained a well-balanced population of 182 patients. The differences between the incidence of AKI in the TRA and TFA were not significant in both the overall (9.0 vs 11.2%, p = 0.503) and PS-matched (9.9 vs 7.7%, p = 0.601) study population. TRA resulted in a significantly lower incidence of SCr increase of ≥ 50% in unmatched patients. However, after PS matching, there was no difference between the TRA and TFA in any variable of secondary post-PCI renal outcomes. Age, female gender, baseline SCr level, baseline estimated glomerular filtration rate and contrast volume were independent predictors of AKI.

CONCLUSION

Compared to the conventional TFA, TRA was not associated with a reduced incidence of AKI after PCI in patients not complicated by major bleeding, acute heart failure and haemodynamic disturbances.

[Efficacy of L-shaped Shielding in Interventional Radiology by Transradial Approach and Consideration of Methods for Appropriate Use]

The present study investigated how effective an L-shaped shield was, depending on its position, in reducing a doctor's exposure to radiation during catheterization to access the transradial approach (TRA). The shield's effectiveness was evaluated by measuring the air kerma where the doctor stood under four conditions: with and without the shield, and with and without the shield in conjunction with conventional protection. To enable the shield to be positioned correctly in clinical practice, an illustrated instruction decal affixable to the shield's doctor-facing surface was produced, and the effectiveness of the decal was verified by means of a crossover test in which, as subjects of the study, different nurses set up the shield with and without the decal affixed to it. In the test, in which a human body phantom was used, the C-arm set at the PA angle, and the shield positioned 10 cm from the axilla of the phantom, the shield's effectiveness at 100 cm, 130 cm, and 160 cm above the floor where the doctor stood was 55%, 77%, and 47%, respectively. The effectiveness increased when the shield was positioned closer to the axilla. A significant difference in the positioning of the shield by the subjects was observed depending on whether or not the decal was affixed ( p<0.05, Wilcoxon signed-rank test), indicating that the use of the decal improved the positioning. It was concluded that, positioned correctly, the shield could effectively reduce the doctor's exposure to radiation during TRA.

Compartment syndrome associated with vascular avulsion caused by transradial access in neurointervention for unruptured intracranial aneurysm: illustrative case

BACKGROUND

Transradial access (TRA) has a lower risk of access-site complications than transfemoral access but can cause major puncture-site complications, including acute compartment syndrome (ACS).

OBSERVATIONS

The authors report a case of ACS associated with radial artery avulsion after coil embolization via TRA for an unruptured intracranial aneurysm. An 83-year-old woman underwent embolization via TRA for an unruptured basilar tip aneurysm. Following embolization, strong resistance was felt during removal of the guiding sheath due to vasospasm of the radial artery. One hour after neurointervention via TRA, the patient complained of severe pain in the right forearm, with motor and sensory disturbance of the first 3 fingers. The patient was diagnosed with ACS causing diffuse swelling and tenderness over the entire right forearm due to elevated intracompartmental pressure. The patient was successfully treated by decompressive fasciotomy of the forearm and carpal tunnel release for neurolysis of the median nerve.

LESSONS

TRA operators should be aware that radial artery spasm and the brachioradial artery pose a risk of vascular avulsion and resultant ACS and warrant precautionary measures. Prompt diagnosis and treatment are essential because ACS can be treated without the sequelae of motor or sensory disturbance if properly addressed.

Comparison of Safety of RADial comPRESSion Devices: A Multi-Center Trial of Patent Hemostasis following Percutaneous Coronary Intervention from Conventional Radial Access (RAD-PRESS Trial)

Although radial access is the current gold standard for the implementation of percutaneous coronary interventions (PCI), post-procedural radial compression devices are seldom compared with each other in terms of safety or efficacy. Our group aimed to compare a cost effective and potentially green method to dedicated radial compression devices, with respect to access site complications combined in a device oriented complex endpoint (DOCE), freedom from which served as our primary endpoint. Patients undergoing PCI were randomized to receive either the cost effective or a dedicated device, either of which were removed using patent hemostasis. Twenty-four hours after the procedure, radial artery ultrasonography was performed to evaluate the access site. The primary endpoint was assessed using a non-inferiority framework with a non-inferiority margin of five percentage points, which was considered as the least clinically meaningful difference. The cost-effective technique and the dedicated devices were associated with a comparably low rate of complications (freedom from DOCE: 83.3% vs. 70.8%, absolute risk difference: 12.5%, one-sided 95% confidence interval (CI): 1.11%). Composition of the DOCE (i.e., no complication, hematoma, pseudoaneurysm, and radial artery occlusion) and compression time were also assessed in superiority tests as secondary endpoints. Both the cost-effective technique and the dedicated devices were associated with comparably low rates of complications: p = 0.1289. All radial compression devices performed similarly when considering the time to complete removal of the respective device (120.0 (inter-quartile range: 100.0-142.5) for the vial vs. 120.0 (inter-quartile range: 110.0-180) for the dedicated device arm, with a median difference of [95% CI]: 7.0 [-23.11 to 2.00] min, p = 0.2816). In conclusion, our cost-effective method was found to be non-inferior to the dedicated devices with respect to safety, therefore it is a safe alternative to dedicated radial compression devices, as well as seeming to be similarly effective.

The Role of Ultrasound in Accessing the Distal Radial Artery at the Anatomical Snuffbox for Cardiovascular Interventions

In an effort to refine transcatheter vascular interventions, radial artery access has moved more distally at the anatomical snuffbox. Here, more challenges appear as the artery is smaller, more angulated, and more difficult to palpate. Including ultrasound guidance as a mandatory step during puncture may encourage more operators to switch to this approach. In the femoral approach, ultrasound guidance is strongly recommended because of bleeding complications, whereas in the proximal (conventional) radial approach, the role of ultrasound remains optional, and in current practice, almost all cases are performed by palpation of the pulse only. However, in distal radial access, the situation is different because the artery differs in caliber and position, and imaging can help the operator for a clean puncture, especially since repeated punctures are not only painful but also any hematoma formation leads to the complete compression of the artery and failure of access. The aim of this review is to investigate the rationale of vascular ultrasound during distal radial access and to establish some techniques and anatomical landmarks for the ultrasonographic exploration of the dorsal area of the hand.

Comparative Study of Transradial Versus Transfemoral Route Percutaneous Coronary Intervention in Acute ST-Elevation Myocardial Infarction

Introduction Percutaneous coronary intervention (PCI) is the first choice of treatment for myocardial infarction (MI). However, entry site failure is still one of the major complications faced by the interventionist. Hence the present study compared the efficacy and complications of radial and femoral approaches in PCI in ST-elevation myocardial infarction (STEMI). Methods A hospital-based prospective study was conducted on patients with acute STEMI. A total of 100 patients were enrolled that were randomly divided into two groups of 50 each, i.e., patients that had undergone PCI by radial approach (N=50) and those who had undergone PCI by femoral approach (N=50). Results The male-to-female ratio was 1.5:1 and 1.6:1 in the transradial (TR) and transfemoral (TF) groups, respectively. With respect to age, both the groups were dominated by the age group of 50-60 years, with 42% in the TR group and 34% in the TF group having an age >60 years. The mean access time, fluoroscopy time, and procedural time in the TR group were 6.0 ± 0.7 minutes, 5.9 ± 0.6 minutes, and 29.55 ± 0.9 minutes, respectively. In the TF group, the mean access time, fluoroscopy time, and procedural time were 5.1 ± 0.5 minutes, 5.5 ± 0.7 minutes, and 26.7 ± 2.1 minutes, respectively. In the TR group, ecchymosis and loss of radial pulse were observed in 10% of the patients, thrombophlebitis in 4%, and bleeding complications in 2%. While in the TF group, ecchymosis was observed in 26%, followed by thrombophlebitis (24%), minor hematoma, and bleeding complications (14%). Conclusion The present study emphasizes the use of radial access in patients with ST-segment elevation acute coronary syndrome, as this approach was associated with significant clinical benefits. Moreover, bleeding complications were more in patients undergoing TF intervention.

A novel 3-Fr guiding sheath for transradial access in aneurysm embolization: Technical note

Neurointervention via transradial access (TRA) is challenging when the radial artery is narrow. We performed aneurysm embolization via TRA using a novel 3-Fr guiding sheath (GS) (Axcelguide; Medikit, Tokyo, Japan) with an outer diameter of only 1.76 mm for patients with a radial artery of inner diameter less than 2 mm, and described the whole procedure and pitfalls as a technical note. Here, we present two patients with radial arteries less than 2 mm. One patient had a narrow neck intracranial aneurysm at the bifurcation of the left vertebral artery and posterior inferior cerebellar artery, which was embolized with the primary coiling technique. The other was a patient with a wide-necked extracranial aneurysm in the cavernous portion of the right internal carotid artery, which was embolized with the transcell technique with stent. We utilized a 3-Fr GS, distal access catheter, and a 0.0165-inch microcatheter for coil embolization. All aneurysms were completely occluded, without neurological or puncture site-related complications including subcutaneous hematoma, radial artery occlusion, and vasospasm. This report provides the first description of neurointervention using a 3-Fr GS. The 3-Fr GS contributed to successful completion of TRA aneurysm embolization without neurological or puncture site-related complications in patients with radial arteries narrower than 2 mm. The 3-Fr GS may be useful to accomplish aneurysmal embolization via TRA even in patients with a small radial artery.

Improved Outcomes With Transradial Approach in Alcohol Septal Ablation

BACKGROUND

Transradial cardiac catheterization is equally effective but has fewer vascular complications than transfemoral catheterization. There is a paucity of data on biradial approach for alcohol septal ablation (ASA). This study seeks to study the differences in procedural outcomes between the transradial vs traditional transfemoral approach in ASA.

METHODS

A total of 274 consecutive patients who underwent ASA were retrospectively assigned to the study subgroups (137 transradial, 137 femoral). Procedural success, reduction in left ventricular outflow tract gradient (LVOTG), contrast volume, fluoroscopy time, and complications were compared between the 2 groups.

RESULTS

There were no differences in reduction of resting LVOTG (91% vs 92%; P=.50), provoked LVOTG (80% vs 82%; P=.47) post procedure between transradial vs transfemoral subgroups. Iodinated contrast volume was significantly lower in the transradial group (98 mL vs 111 mL; P=.04), whereas fluoroscopy time was higher in the transradial group (17.42 minutes vs 13.00 minutes; P&lt;.001). The incidence of complications was lower in the transradial group (0.13 vs 0.23; P=.04).

CONCLUSIONS

ASA via transradial approach is equally effective and associated with significantly less contrast use and fewer complications as compared with the traditional transfemoral approach.

Initial Experience With a Novel Sheathless Guiding Catheter (Hyperion SheathLess) for Transradial Coronary Intervention

BACKGROUND

The Hyperion SheathLess guiding catheter (Asahi Intecc) is a novel guiding system for transradial percutaneous coronary intervention (PCI). Compared with the previous model (SheathLess Eaucath; Asahi Intecc), improvements achieved with the Hyperion SheathLess catheter are a more flexible tip and a smaller outer diameter of the catheter while maintaining the diameter of the inner lumen. The aim of this study was to report our initial experience with this guiding catheter.

METHODS

A total of 127 consecutive patients undergoing transradial PCI using a 6-Fr Hyperion SheathLess guiding catheter (n = 78) or a 7-Fr catheter (n = 49) were analyzed.

RESULTS

Procedural success was 99.2%, with 1 patient (0.8%) requiring conversion to femoral access. No patients were noted to have coronary ostial dissection. Doppler ultrasound examination of the radial artery at 30-day follow-up was available in 111 of 127 patients, with 3 patients (2.7%; all 3 patients in the 7-Fr catheter group) found to have radial artery occlusion. Radial spasm occurred in 3 patients (2.4%; all 3 patients in the 7-Fr catheter group). Forearm hematoma occurred in 10 patients (7.9% total; 4 grade-1 patients [3.2%], 5 grade-2 patients [3.9%], and 1 grade-3 patient [0.8%]).

CONCLUSION

The use of the Hyperion SheathLess guiding catheter for transradial PCI was feasible and associated with a low rate of procedure-related complications, including coronary ostial dissection. This sheathless guiding catheter could be a valuable option to further decrease the risk of procedure-related complications.

Could radiation exposure be the Achilles' heel of distal transradial artery access?

Distal transradial access for vascular interventions has gained ground recently. While the novel approach is associated with reduced radial artery occlusion and faster hemostasis, it could be related with prolonged procedural time, higher crossover rate and increased radiation, comparing to conventional transradial approach. Whether the radiation is increased in the procedures performed by the novel approach remains unambiguous. In the specific article, we aim to review the current literature and to propose possible explanations for this phenomenon. Could radiation be the Achilles’ heel of distal transradial artery access?

Four French sheath-based transradial cerebral angiographies in the elderly: A single neurointerventionalist's experience

BACKGROUND

Catheter angiography via transradial access (TRA) is better at reducing access site complications and morbidity than via transfemoral access (TFA). The rate of periprocedural complications increases in elderly populations and using a smaller sheath can help reduce access site complications. The aim of this study was to assess the feasibility and safety of 4 F sheath-based TRA cerebral angiography in elderly patients (≥65 years) and compare it to TFA cerebral angiography.

METHODS

The medical records of elderly patients undergoing diagnostic cerebral angiography with a single neurointerventionalist via TRA (57 cases, from July 2019 to December 2020) versus TFA (69 cases, from January 2018 to June 2019) were retrospectively reviewed. All TRA angiographies were performed via right radial artery access with a 4 F sheath and a 4 F Simmons 2 catheter.

RESULTS

There were no significant differences (TRA vs. TFA) in age (71.1 ± 4.0 vs. 72.1 ± 4.6 years, p = 0.189), accessed vessels (3.9 ± 0.5 vs. 3.9 ± 0.6, p = 0.852), fluoroscopy time (7.1 ± 3.3 vs. 7.6 ± 3.5 min, p = 0.068), and radiation exposure (42.1 ± 15.8 vs. 47.0 ± 13.7 Gy-cm², p = 0.067). However, the procedure duration was significantly shorter in the TRA group (17.2 ± 3.9 vs. 19.0 ± 6.0 min, p = 0.003). Painful groin hematoma occurred in 2 of the 69 cases (2.9%) in the TFA group. In the TRA group, access site complications were not occurred; however, catheter kinks occurred in 2 of 57 cases (3.5%).

CONCLUSIONS

The 4 F sheath-based TRA is a feasible option for diagnostic cerebral angiography in elderly patients. However, care should be taken during catheter manipulation.

The Transulnar Approach to Coronary Angiography and Intervention: Assessing the Anatomy of the Ulnar Artery Using Angiography

BACKGROUND

The transulnar approach (TUA) has been proposed as a safe alternative to the more established transradial approach (TRA) for cardiac catheterization. However, no study has assessed the anatomy and variability of the ulnar artery using angiography.

METHODS

A retrospective analysis of patients who underwent transradial cardiac catheterization during routine clinical care was conducted. Both quantitative and qualitative measurements of artery diameter were collected.

RESULTS

Among 700 consecutive patients, mean distal ulnar artery diameter (UAD) was larger in men (3.2 ± 0.9 mm) compared with women (2.7 ± 0.7 mm; P<.001). UAD was larger than radial artery diameter (RAD) at all measured sites (distal ulnar, 3.0 ± 0.8 mm; distal radial, 2.9 ± 0.7 mm; P=.046). Compared with the radial artery, the ulnar artery had more atresia (4.3% ulnar vs 0% radial; P<.001), fewer loops (0.6% ulnar vs 2.4% radial; P<.01), and less spasm (2.7% ulnar vs 23.4% radial; P<.001). UAD had more variability (distal variance, 0.68) as compared with the RAD (distal variance, 0.53; P<.001).

CONCLUSION

We found that the ulnar artery has a larger diameter, fewer loops, and less spasm, but more variance than the radial artery. Additionally, males have larger ulnar arteries than women. These findings have implications on the application of TUA either as an alternative to TRA or as the primary point of access.

First Reported Use of a Visualization Device for the Radial Artery With Near-Infrared Rays Through the Transradial Approach

OBJECTIVES

The transradial approach (TRA) is recommended in coronary catheterization due to the lower rate of bleeding complications compared with the transfemoral approach. However, a disadvantage of TRA is difficulty in puncturing under palpation of the radial pulse alone without arterial visibility. To overcome this limitation, a vessel visualization device using near-infrared rays, Art View (Forte Grow Medical Company), was used in the puncture of the radial artery (RA).

METHODS

Patients who underwent coronary angiography via the right RA with Art View were retrospectively surveyed. According to the quality of RA visibility, the performance of the Art View was rated as follows: 5 = excellent; 4 = good; 3 = fair; 2 = not good; and 1 = poor. The primary endpoint was the procedural success of TRA using the Art View device. The secondary endpoints were procedural time (from injection of local anesthesia to successful crossing of the guidewire attached to the sheath), number of RA punctures, and change of puncture method or approach site.

RESULTS

The Art View device was used in 38 patients (mean age, 71 ± 11 years). Puncturing of the visualized RA was successful in 30 patients (79.0%). Among successful cases, the mean procedural time was 142 ± 87 seconds. The success rates of each visualization evaluation were 100%, 100%, 84.6%, 33.3%, and 0% from grades 5 to 1, respectively (P<.01). The mean procedural times were 92 ± 18 seconds, 102 ± 58 seconds, 180 ± 75 seconds, 306 ± 80 seconds, and not available from grades 5 to 1, respectively (P<.01).

CONCLUSION

The Art View RA visualization device is useful for RA puncture.

Transdermal Nitroglycerin Patch as a Potential Pretreatment to Prevent Radial Artery Spasm During Transradial Cardiac Catheterization

A recent guideline has recommended the radial artery as the access site for coronary catheterization due to lower risk of bleeding and vascular complications. However, the transradial approach is not necessarily easy for interventionalists due to the smaller vessel diameter and more frequent occurrence of vasospasm induced by the procedure. By using the measurement in ultrasound, a previous study demonstrated that subcutaneous nitroglycerin injection at the radial artery puncture site dilated the radial artery, and that a patch was also easier and less invasive. The current case suggests the applicability of a nitroglycerin transdermal patch to prevent vasospasm via local transdermal absorption into the arterial wall; its use may lead to a higher success rate for the transradial approach, especially in patients who had experienced radial artery vasospasm.

Delayed Onset of Retinal Embolism After Coronary Angioplasty

Although rare, retinal artery cholesterol emboli (Hollenhorst plaques) post angioplasty can be a severe event that can cause irreversible visual disturbances, usually taking place during or following the procedure. However, as the number of procedures continues to increase, interventional radiologists or cardiologists who perform coronary catheterization should be cognizant of its possible delayed occurrence, as in the case presented herein.

Dual-center study comparing transradial and transfemoral approaches for flow diversion treatment of intracranial aneurysms

BACKGROUND

The transfemoral approach (TFA) has been the traditional approach for neurointerventional cases. While the TFA allows for triaxial support in flow diverting stent cases, it is associated with access site complications. Recently, the transradial approach (TRA) has emerged as a safer alternative to the TFA. To the best of our knowledge, there have only been single-center studies comparing outcomes in flow diverter cases for these approaches. We demonstrate the safety and feasibility of the TRA for placement of flow diverting stents in the treatment of unruptured intracranial aneurysms at two high-volume centers.

MATERIALS AND METHODS

We performed a retrospective review of prospectively collected institutional databases at two high-volume neuroendovascular centers. Cases from 2016 to 2018 of unruptured intracranial aneurysms treated by flow diverting stenting accessed through either the TRA or the TFA were compared. Patient demographics, procedural and radiographic metrics including location and size of the aneurysm, size, and length of the flow diverter implant, and fluoroscopic time were recorded. Puncture site complications and length of hospital stay were also included in the data analysis.

RESULTS

There were three out of 29 TRA cases which were converted to the TFA. None of the TRA patients experienced site complications, whereas three TFA patients experienced site complications. While TRA and TFA patients did not differ significantly in their exposure to radiation, TRA patients experienced shorter hospital stays.

CONCLUSIONS

While long-term studies are still lacking regarding this approach, we demonstrate that the TRA is a safe and feasible approach for flow diverter stent placement.

Arterial Anomalies of the Upper Limb and Their Influence on Transradial Coronary Procedures

OBJECTIVES

During transradial coronary procedures, arterial anomalies of the upper limb can lead to transradial navigation difficulties. We aimed to evaluate the incidence and impact of these anomalies on transradial procedures.

METHODS

In consecutive patients undergoing transradial coronary procedures, antegrade upper-limb arterial angiography was done at the end of the procedure with the catheter tip in the subclavian artery. Radial artery angiography from the sheath was done only if the guidewire or catheter could not be navigated. Patient characteristics, upper-limb arterial anatomy, and transradial outcomes were assessed.

RESULTS

Among 1195 patients, upper-limb arterial anomalies were noted in 117 patients (9.7%). High origin of the radial artery was the most common anomaly (8.1%) followed by radial artery loop (0.9%). Transradial navigation difficulties and failures were significantly more frequent in patients with these anomalies vs those without anomalies (42.7% vs 2.0% [P<.001] and 9.4% vs 0.9%, [P<.001], respectively). There was a greater need for radial road mapping and navigation assistance techniques, including balloon/pigtail assisted tracking. Passage for radial artery loop was associated with maximum navigation difficulties and higher transradial failure rate (63.6%). Fluoroscopy time, radiation dose, and transradial complications, including forearm hematoma and radial artery occlusions, were also significantly higher in patients with upper-limb arterial anomalies.

CONCLUSION

Different upper-limb arterial anomalies are associated with different degrees of impact on transradial outcomes; these patients require an individualized approach for transradial navigation.

The Safety and Feasibility of Transitioning From Transfemoral to Transradial Access Left Ventricular Endomyocardial Biopsy

BACKGROUND

Left ventricular endomyocardial biopsy (LVEMB) is commonly performed via the transfemoral route. Radial access may help reduce vascular access complications, but there are few data on the safety and feasibility of transradial LVEMB.

OBJECTIVE

Describe the safety and feasibility of transitioning from transfemoral to transradial access LVEMB.

METHODS

This is a single-center, prospective, observational cohort study. Fifty procedures in 49 patients were included, 25 (50%) via the femoral route and 25 (50%) via the radial route.

RESULTS

The cohort had a mean age of 47 ± 13 years and the most common indication for LVEMB was myocarditis. From June 2015 until September 2016, all procedures (n = 21) were performed via the femoral approach; thenceforth, there was a gradual transition to the radial approach. More tissue samples were obtained when the procedure was performed via the femoral approach (P<.01). The minimum sampling target of 3 specimens was not met in 4 patients (16%) via the radial approach and in 1 patient (4%) via the femoral approach. Complications occurred in 3/25 transradial procedures (12%; 2 cardiac perforations and 1 forearm hematoma) and 3/25 transfemoral procedures (12%; 1 cardiac perforation, 1 femoral artery pseudoaneurysm, and 1 ventricular fibrillation). Cardiac perforations via the transradial approach occurred during the early transition period. There were no deaths.

CONCLUSIONS

Transradial LVEMB is feasible, with a similar complication profile to femoral procedures, but associated with a smaller number of specimens. Transitioning from transfemoral to transradial procedures may initially be associated with a higher risk of complications and potentially a lower diagnostic yield.

Distal Radial Artery Access for Superficial Femoral Artery Interventions

PURPOSE

To compare the acute success and complication rates of distal radial (DR) vs proximal radial (PR) artery access for superficial femoral artery (SFA) interventions.

MATERIALS AND METHODS

Between 2016 and 2019, 195 consecutive patients with symptomatic SFA stenosis were treated via DR (n=38) or PR (n=157) access using a sheathless guide. Secondary access was achieved through the pedal artery when necessary. The main outcomes were technical success, major adverse events (MAEs), and access site complications. Secondary outcomes were treatment success, fluoroscopy time, radiation dose, procedure time, and crossover rate to another puncture site.

RESULTS

Overall technical success was achieved in 188 patients (96.4%): 37 of 38 patients (97.3%) in the DR group and 151 of 157 patients (96.2%) in the PR group (p=0.9). Dual (transradial and transpedal) access was used in 14 patients (36.8%) in the DR group and 28 patients (18.9%) in the PR group (p<0.01). Chronic total occlusions were recanalized in 25 of 26 DR patients (96.1%) and in 79 of 81 PR patients (92.6%) (p=0.57). The crossover rate to femoral access was 0% in the DR group vs 3.2% in the PR group (p=0.59). Stents were implanted in the SFA in 15 DR patients (39.4%) and in 39 patients (24.8%) in the PR group (p=0.1). The contrast volume, fluoroscopy time, radiation dose, and procedure time were not statistically different between the DR and PR groups, nor were the rates of access site complications (2.6% and 7.0%, respectively). The cumulative incidences of MAE at 6 months in the DR and PR groups were 15.7% vs 14.6%, respectively (p=0.8).

CONCLUSION

SFA interventions can be safely and effectively performed using PR or DR access with acceptable morbidity and a high technical success rate. DR access is associated with few access site complications.

Distal Radial Artery Access for Superficial Femoral Artery Interventions

Purpose:

To compare the acute success and complication rates of distal radial (DR) vs proximal radial (PR) artery access for superficial femoral artery (SFA) interventions.

Materials and Methods:

Between 2016 and 2019, 195 consecutive patients with symptomatic SFA stenosis were treated via DR (n=38) or PR (n=157) access using a sheathless guide. Secondary access was achieved through the pedal artery when necessary. The main outcomes were technical success, major adverse events (MAEs), and access site complications. Secondary outcomes were treatment success, fluoroscopy time, radiation dose, procedure time, and crossover rate to another puncture site.

Results:

Overall technical success was achieved in 188 patients (96.4%): 37 of 38 patients (97.3%) in the DR group and 151 of 157 patients (96.2%) in the PR group (p=0.9). Dual (transradial and transpedal) access was used in 14 patients (36.8%) in the DR group and 28 patients (18.9%) in the PR group (p<0.01). Chronic total occlusions were recanalized in 25 of 26 DR patients (96.1%) and in 79 of 81 PR patients (92.6%) (p=0.57). The crossover rate to femoral access was 0% in the DR group vs 3.2% in the PR group (p=0.59). Stents were implanted in the SFA in 15 DR patients (39.4%) and in 39 patients (24.8%) in the PR group (p=0.1). The contrast volume, fluoroscopy time, radiation dose, and procedure time were not statistically different between the DR and PR groups, nor were the rates of access site complications (2.6% and 7.0%, respectively). The cumulative incidences of MAE at 6 months in the DR and PR groups were 15.7% vs 14.6%, respectively (p=0.8).

Conclusion:

SFA interventions can be safely and effectively performed using PR or DR access with acceptable morbidity and a high technical success rate. DR access is associated with few access site complications.

Radial artery pseudoaneurysm as a rare very late complication of transradial cardiac catheterization

AIMS

Here, we report a case of very late (70+ days) development of pseudoaneurysm on the site of sheath insertion in a 60- year old woman.

METHODS

The patient underwent cardiac catheterization using transradial approach.

RESULTS

Despite the transradial approach, which is generally considered as a suitable prevention of this problem, and despite absence of any periprocedural complications, the patient developed a pseudoaneurysm after more than 70 days from the procedure.

CONCLUSIONS

In some cases, a pseudoaneurysm may develop extremely late after cardiac catheterization. Such an extremely late development of pseudoaneurysm has not been described in literature so far.

First case series of the transradial approach for neurointerventional procedures in pediatric patients

OBJECTIVE

The transradial approach (TRA) has been widely adopted by interventional cardiologists but is only now being accepted by neurointerventionalists. The benefits of the TRA over the traditional transfemoral approach (TFA) include reduced risk of adverse clinical events and faster recovery. The authors assessed the safety and feasibility of the TRA for neurointerventional cases in the pediatric population.

METHODS

Pediatric patients undergoing cerebrovascular interventions since implementation of the TRA at the authors' institution were retrospectively reviewed. Pertinent patient information, procedure indications, vessels catheterized, fluoroscopy time, and complications were reviewed.

RESULTS

There were 4 patients in this case series, and their ages ranged from 13 to 15 years. Each patient tolerated the procedure performed using the TRA without any postprocedural issues, and only 1 patient experienced radial artery spasm, which resolved with the administration of intraarterial verapamil. None of the patients required conversion to the TFA.

CONCLUSIONS

The TRA can be considered a safe alternative to the TFA for neurointerventional procedures in the pediatric population and provides potential advantages. However, as pediatric patients require special consideration due to their smaller-caliber arteries, routine use of ultrasound guidance is advised when attempting the TRA.

Transradial Repair of Type IA Endoleak

An 81-year-old Caucasian male with a known abdominal aortic aneurysm (AAA) was referred to the endovascular clinic. One month after successful endovascular repair, surveillance CTA showed endoleak with presence of contrast within the aneurysmal sac. An elective repair was performed.

Transradial approach for endovascular diagnosis and treatment of ruptured cerebral aneurysms: A descriptive study

Background:

For cardiovascular procedures, the transradial approach has been documented to yield fewer complications than the femoral approach. It has become the approach of choice for diagnostic and therapeutic interventions involving the coronary arteries. However, few published data exist on using this approach for neuroendovascular procedures and we describe a series of ruptured cerebral aneurysms diagnosed and treated using the transradial approach.

Methods:

All patients scheduled for cerebral angiography to diagnose and treat subarachnoid hemorrhages at our hospital from June 2016 to May 2018, by right radial artery access, were recruited and followed prospectively. The main outcomes of interest were the length of the procedure (in minutes), the success of treatment, and the incidence of postprocedural complications.

Results:

Over the observation period, 59 patients (66% women, mean age = 48 years) with a combined 61 aneurysms treated were identified who met inclusion criteria. Of the 61 aneurysms treated, eight (13%) were within the posterior circulation (13%) and 53 (87%) the anterior circulation. Average procedural duration was 64.9 min. No occlusion or spasm of the radial artery was observed during any procedure. All patients had immediate pre- and post-embolization angiography, which revealed the guide catheter coming from the right subclavian artery. A radial pulse was evident after all interventions. All procedures were considered successful at treating the ruptured aneurysm, and no patient experienced a clinically significant complication related to the approach.

Conclusions:

The transradial approach is a viable option for the diagnosis and endovascular treatment of acute cerebral aneurysms in different locations.

Role of vascular ultrasound scanning in repeated trans-radial coronary artery intervention (prospective randomized study)

OBJECTIVES

We aimed to detect if pre-procedure vascular ultrasound scanning (VUS) of radial arteries (RAs) can increase the radial access success (RAS) rate and/or reduce the vascular access time (VAT), by guiding the choice of the proper access site for repeated trans-radial interventions (TRIs).

BACKGROUND

Currently, repeated-TRIs are encountered more frequently in most of the cath. labs. However, structural changes of the RAs after TRA may hinder it is usage for repeated-TRI. VUS is the most accurate noninvasive test for assessing RAs, nonetheless, its role in the setting of repeated-TRIs has not been studied before.

MATERIAL AND METHODS

We randomly assigned 300 patients undergoing repeated-TRI, to either planning the vascular access site based upon the result of VUS that was performed pre-procedural (group A, 150 patients) or to be left to the operator's discretion (group B, 150 patients).

RESULTS

In group A (143/145 [98.6%]), RAS rate was only numerically higher than group B (143/150 [95.3%]), P = 0.08. There was a statistically significant differences between both groups in VAT [(1.25 ± 0.17 min), vs. (4.95 ± 0.87 min) for group A and B, respectively, P = 0.02] and in procedure duration [(37.2 ± 19.8 min) vs. (51.8 ± 18.6 min) for group A and B, respectively, P = 0.04]. RA spasm was more common in group B [18% (27/150)] than group A [2% (3/145)], P = 0.001.

CONCLUSION

VUS of RAs prior to repeated-TRI is associated with significant reduction in VAT, procedure duration, RA spasm and a mild increase in the RAS rate.

Successful percutaneous coronary intervention for chronic total occlusion via the radial artery

Over the past decade, percutaneous coronary interventions (PCIs) performed via radial artery (RA) access have become popular among interventional cardiologists. Since the radial approach may limit the options in complex cases, most interventional cardiologists prefer femoral access to RA access for complex procedures, such as chronic total occlusions (CTOs) and bifurcation lesions. Presently described is a case of CTO of the right coronary artery that was successfully treated with PCI via the left RA. This study demonstrates that if there is an indication for revascularization and the CTO lesions are short and without poor prognostic factors, an intervention for CTO should still be considered, even if there is no femoral access.

Novel method for radial sheath removal using manual pressure over hemostatic pad combined with ulnar compression

Objectives

Study a novel method using manual pressure on a hemostatic pad and hemoband for ulnar compression as a potential alternative for radial sheath removal.

Background

The standard for transradial access site (TRA) sheath removal requires an inflatable pressure band over the radial artery and recently a band over the ulnar artery to reduce complications. We present a novel technique using a SoftSeal®‐STF hemostatic pad over the radial artery combined with a hemoband over the ulnar artery after sheath removal.

Methods

All patients had activated clotting time (ACT); sheath removal was performed immediately upon transfer to the recovery room. A hemoband compressed the ulnar artery, radial artery flow was measured using plethysmography and pulse oximetry while direct pressure applied using SoftSeal‐STF hemostatic pad for 15 min after radial sheath removed. Radial artery patency was measured using reverse Barbeau test. If radial artery occlusion (RAO) present, patient was asked to return in one month to repeat test.

Results

Fifty‐nine patients were enrolled in the study, one‐third with diabetes mellitus, one‐third with prior coronary artery bypass surgery, and one‐third with history of percutaneous coronary intervention. Mean ACT 261 ± 50 sec, all patients had 4 Fr sheaths and no PCI were performed. Three (6%) patients had minor bleeding requiring use of a pressure band and one (2%) had RAO, which re‐canalized at one month.

Conclusions

Manual pressure of SoftSeal‐STF hemostatic pad combined with ulnar compression is a potential alternative to current practice with an inflatable pressure band.

Novel Patient-Centered Approach to Facilitate Same-Day Discharge in Patients Undergoing Elective Percutaneous Coronary Intervention

Background

Same‐day discharge (SDD) after elective percutaneous coronary intervention is safe, less costly, and preferred by patients, but it is usually performed in low‐risk patients, if at all. To increase the appropriate use of SDD in more complex patients, we implemented a “patient‐centered” protocol based on risk of complications at Barnes‐Jewish Hospital.

Methods and Results

Our objectives were as follows: (1) to evaluate time trends in SDD; (2) to compare (a) mortality, bleeding, and acute kidney injury, (b) patient satisfaction, and (c) hospital costs by SDD versus no SDD (NSDD); and (3) to compare SDD eligibility by our patient‐centered approach versus Society for Cardiovascular Angiography and Interventions guidelines. Our patient‐centered approach was based on prospectively identifying personalized bleeding, mortality, and acute kidney injury risks, with a personalized safe contrast limit and mitigating those risks. We analyzed Barnes‐Jewish Hospital's National Cardiovascular Data Registry CathPCI Registry data from July 1, 2009 to September 30, 2015 (N=1752). SDD increased rapidly from 0% to 77% (P<0.001), independent of radial access. Although SDD patients were comparable to NSDD patients, SDD was not associated with adverse outcomes (0% mortality, 0% bleeds, and 0.4% acute kidney injury). Patient satisfaction was high with SDD. Propensity score–adjusted costs were $7331 lower/SDD patient (P<0.001), saving an estimated $1.8 million annually. Only 16 patients (6.95%) met the eligibility for SDD by Society for Cardiovascular Angiography and Interventions guidelines, implying our patient‐centered approach markedly increased SDD eligibility.

Conclusions

With a patient‐centered approach, SDD rapidly increased and was safe in 75% of patients undergoing elective percutaneous coronary intervention, despite patient complexity. Patient satisfaction was high, and hospital costs were lower. Patient‐centered decision making to facilitate SDD is an important opportunity to improve the value of percutaneous coronary intervention.

Double guide double wrist 5F left coronary artery transradial percutaneous coronary intervention and the X-Kiss technique

Percutaneous coronary intervention for bifurcated anatomy, particularly at the proximal left coronary artery site, requires guide catheters (GC) of at least 6 french and preferably larger in diameter. We describe a new trans-radial approach more suitable for small artery size: the simultaneous use of both radial arteries for double cannulation of the LMCA with 5F GC: each GC will target either the LM/LAD or the LM/CX artery (or LM-LAD/LM-LAD-1st diagonal branch) stenoses. The technique successfully was applied to 5 cases. When the technique was used for distal left main coronary artery stenoses (3 cases), a special crogss-like configuration obtained when guide catheters, coronary wires and balloons kissed was observed.

Beam projections and radiation exposure in transradial and transfemoral approaches during coronary angiography

OBJECTIVE

We aimed to compare the operator and patient radiation exposure in standard projections during elective diagnostic coronary angiography procedures via transradial (TRA) versus transfemoral (TFA) approaches.

METHODS

In this analytical cross-sectional study, a total of 202 consecutive patients who were candidates for diagnostic coronary angiography were randomized to undergo the procedure via TFA or TRA approaches (101 in each group). Patients with abnormal Allen test and history of coronary artery bypass surgery, valvular heart disease, and unsuccessful coronary angiography were excluded from the study. A single operator performed all of the procedures using a single angiography system. Patient and operator radiation exposure were measured using diamentor and an electronic personal dosimeter, respectively. Each procedure comprised a standardized sequence of projections including four standard views for the left coronary system and two standard views for the right coronary system.

RESULTS

Left anterior oblique (LAO) caudal (50°/30°) and right anterior oblique RAO (30°) projections were associated with the highest and lowest patient radiation exposure, respectively. The operator received a significantly higher radiation exposure in the TRA approach for LAO cranial (for both left and right coronary systems) and LAO caudal (for left coronary system) projections during coronary angiography compared with the TFA approach.

CONCLUSION

Though a similar amount of patient radiation exposure in each projection was observed among TFA and TRA groups; LAO cranial and LAO caudal projections were associated with a significantly higher operator radiation exposure in the TRA group. These findings need to be considered when choosing the optimal arterial approach for patients scheduled for coronary angiography.

Transradial approach for collateral embolisation

Significant aortopulmonary collaterals in cyanotic CHD patients require closure immediately before definitive intracardiac repair. Traditionally, the transfemoral access has been used for this purpose; however in a few cases, selective and stable hooking of collaterals may be extremely difficult. We describe a case in which we used a new approach for collateral embolisation in a difficult situation.

Treatment of coronary chronic total occlusion by transradial approach: Current trends and expert recommendations

The aim of this review is to highlight the technical details and the scientific data on percutaneous coronary interventions (PCIs) in chronic total occlusion (CTO) performed by transradial approach (TRA). Transfemoral approach (TFA) is commonly regarded as the standard for CTO PCI, but there is a growing number of CTO recanalization procedures performed by TRA. We discuss the relevant technical details to approach a CTO by transradial access, especially the compatibility of various CTO recanalization techniques with specific guiding catheter sizes. Randomized prospective trials in this field are lacking and only data from observational studies are available. We can conclude that transradial access for CTO PCI is feasible and could be very useful in selected patients. In our opinion, transradial access in CTO PCIs should be limited to operators and centers highly experienced in CTO recanaliza¬tion and in TRA.

Efficacy and indications of transradial and transfemoral approaches for peripheral artery stent implantation

The transradial approach (TRA) has become an attractive alternative to the transfemoral approach (TFA) in percutaneous coronary intervention. To date, however, these two approaches have not been systematically compared in various percutaneous peripheral artery interventions (PPAIs). In the present study 258 patients with peripheral artery disease that underwent PPAI via the TRA (n=75) or the TFA (n=183) were analyzed. Clinical factors and outcomes in these two groups were compared. The puncture time was significantly longer (P<0.05) and the prevalence of artery vasospasm significantly higher (P<0.05) in patients who underwent PPAI via the TRA rather than via the TFA. However, the complication rate was significantly lower (P<0.05) and the artery compression time (P<0.05) and time bedridden (P<0.05) were significantly shorter via the TRA than via the TFA. These results suggest that PPAI via the TRA was associated with a lower complication rate, and shorter artery compression time and bedridden time than PPAI via the TFA. The TRA may be preferable for bilateral vertebral artery stenosis, whereas the TFA may be preferable for interventional treatment of carotid and subclavian artery stenosis. Therefore, the catheter length, artery support and push force should be comprehensively considered before choosing the TRA or TFA in the interventional treatment of renal artery stenosis.

Transradial approach to treating endovascular cerebral aneurysms: Case series and technical note

Background:

Several benefits have been described over the years of the transradial versus femoral endovascular approach to cardiac interventions. Consequently, its use has become habitual at most centers that perform cardiac catheterizations. This paper details a right transradial approach, incorporating a variety of coils or flow diverters, which can be utilized for the endovascular treatment of different cerebral aneurysms.

Methods:

From 2014 to 2016, we performed 40 endovascular procedures to treat cerebral aneurysms adopting the same right transradial approach. Five aneurysms were treated with flow diverters and 35 were treated with coils. Seven of these aneurisms were asymptomatic, whereas 33 had already ruptured.

Results:

Satisfactory treatment was achieved in all cases through the same approach in the absence of any complications.

Conclusions:

A right transradial approach may be satisfactory for the endovascular treatment of different cerebral aneurysms, including aneurysms in either hemisphere. This is the largest series of cerebral aneurysms treated through a transradial approach.

Radial/Ulnar angioplasty in selected patients undergoing elective angiography or PCI using complex forearm approach

BACKGROUND

Angioplasty on the radial artery have been performed with good success rates in patients with critical hand ischemia. We sought to assess the feasibility and safety of radial angioplasty on complex radial access in patients undergoing coronary angiography.

METHODS/MATERIAL

A prospective series of procedures with complex radial/ulnar access to which radial-ulnar angioplasty (RU-A) was performed. We set goals of efficacy and safety that included the success rate of the procedure (need for ¨Crossover femoral¨) and the existence of radial pulse at one month.

RESULTS

18 cases of RU-A out of 11,500 procedures from March 2010 to July 2016 (0.15%) were included. The majority of the patients were men with a variety of cardiovascular risk factors (age 71±9; 94% Hypertensive, 56% Diabetic, 18% chronic kidney disease). The most common indication for radial/ulnar angioplasty was severe arteriosclerotic stenosis. Angioplasty was performed with different types of over the wire peripheral balloons (Mean diameter 4,3±1 and mean length 42±15mm), in one case a stent implantation was needed. The success rate was 100% without vascular complications at 1-month clinical and vascular doppler follow-up.

CONCLUSIONS

Radial/ulnar artery angioplasty is feasible and safe in selected patients undergoing elective angiography or percutaneous coronary intervention using complex forearm approach.

Can radial artery pulse grading predict radial artery spasm during transradial approach?

BACKGROUND

Radial artery spasm (RAS) has been defined as one of the major disadvantage of transradial approach.

AIM

The aim of this study was to investigate the predictive value of radial artery pulse grading on RAS during transradial approach.

METHODS

The present study prospectively included 115 consecutive patients who underwent transradial coronary catheterisation at a single centre. Patients were divided into two groups: those with RAS and those without.

RESULTS

The incidence of RAS was 16.5% (n = 19). Multivariate logistic regression analysis demonstrated that female sex, guiding catheter usage, and radial artery pulse grading ≤ 2 independently predicted RAS (odds ratio [OR] 8, 95% confidence interval [CI] 1.8-36.2, p = 0.007, OR 10.6, 95% CI 2.2-51.2, p = 0.03 and OR 25.8, 95% CI 6.1-108.5, p < 0.001, respec-tively). These three variables were weighted proportionally to their respective OR for RAS (female sex [1.5 points], guiding catheter usage [2 points], and radial artery pulse grading ≤ 2 [5 points]). Two risk strata were defined (low risk, score 0-4, high risk, score 5-8.5), and high risk was associated with increased incidence of RAS (n = 13 [61.9%] vs. n = 6 [6.4%], p < 0.001).

CONCLUSIONS

Radial artery pulse grading together with female sex and guiding catheter usage are independent predictors of RAS, and by using a simple risk score high-risk patients for RAS can be identified.

Comparison of a Sheathless Transradial Access With Looping Technique and Transbrachial Access for Carotid Artery Stenting

PURPOSE

To evaluate the feasibility and safety of sheathless transradial access (TRA) with the looping technique for carotid artery stenting (CAS) compared with the transbrachial approach (TBA).

METHODS

Among 99 symptomatic patients with a history of transient ischemic attack (TIA) or stroke, 38 patients (mean age 69±10 years; 28 men) with documented internal carotid artery stenosis were selected for CAS via a sheathless TRA and compared with 61 patients who received CAS via the brachial artery. Routine assessments of radial artery patency using duplex ultrasound and clinical follow-up were performed at 1, 6, and 12 months.

RESULTS

The sheathless TRA technique offered 100% procedure success; only 1 patient in the sheathless TRA group and 2 patients in the TBA group experienced TIAs during the procedure. There were no major complications (major stroke or 30 day in-hospital death) in either group or radial access site complications. The incidence of radial artery occlusion in the sheathless TRA CAS group was 9% (3/33) at 1 year (5 patients died unrelated to the procedure).

CONCLUSION

The sheathless TRA with looping technique may be an alternative to transbrachial access for CAS in patients who have small radial arteries and are unsuitable for the transfemoral approach.

"Combo" technique for the use of 7F guide catheter system during transradial approach

Even a regular lumen of radial artery may create difficulty in smooth negotiation and propagation of a 7F guide catheter while performing intervention through transradial approach. We describe successive five cases of a simple and innovative "Combo" technique, which helps relatively atraumatic tracking of a 7F guide catheter through the course of arm and chest vasculature for successful completion of procedure without significant damage and local pain.

Sheathless guide catheter in transradial percutaneous coronary intervention for ST-segment elevation myocardial infarction

OBJECTIVES

The aim of this study was to assess the safety and efficacy of sheathless guide catheters in transradial percutaneous coronary intervention (PCI) for ST-segment elevation myocardial infarction (STEMI).

BACKGROUND

Transradial PCI for STEMI offers significant clinical benefits, including a reduced incidence of vascular complications. As the size of the radial artery is small, the radial artery is frequently damaged in this procedure using large-bore catheters. A sheathless guide catheter offers a solution to this problem as it does not require an introducer sheath. However, the efficacy and safety of sheathless guide catheters remain to be fully determined in emergent transradial PCI for STEMI.

METHODS

Data on consecutive STEMI patients undergoing primary PCI at the Sendai Kousei Hospital between September 2010 and May 2013 were analyzed. The primary endpoint was the rate of acute procedural success without access site crossover. Secondary endpoints included door-to-balloon time, fluoroscopy time, volume of contrast, and radial artery stenosis or occlusion rate.

RESULTS

We conducted transradial PCI for 478 patients with STEMI using a sheathless guide catheter. Acute procedural success was achieved in 466 patients (97.5%). The median door-to-balloon time was 45 min (range, 15-317 min). The median fluoroscopy time was 16.4 min (range, 10-90 min). The median volume of contrast was 134 mL (range, 31-431 mL). Radial stenosis or occlusion developed in 14 (3.8%) of the 370 evaluable patients.

CONCLUSIONS

This study showed that use of a sheathless guide catheter taking a transradial approach was effective and safe in primary PCI for STEMI. © 2015 Wiley Periodicals, Inc.

Radial artery occlusion and hand strength after percutaneous coronary procedures: Results of the HANGAR study

OBJECTIVES

The aim of this prospective study was to evaluate muscle force of the hand, thumb, and forefinger in patients with prolonged radial occlusion after transradial percutaneous coronary procedures.

BACKGROUND

There are no data on hand strength and function in patients with prolonged radial occlusion after percutaneous coronary procedures.

METHODS

Elective patients with chronic stable angina undergoing percutaneous coronary procedures were evaluated the day before the procedure for radial artery patency, Allen test, hand grip, and thumb and forefinger pinch tests. The same measures were performed the day after the procedure and at follow-up. At follow-up, patients were divided in two groups according to the radial patency (group 1) or occlusion (group 2).

RESULTS

Of the 99 patients included in the study, 90 patients had a patent radial artery (group 1), and nine (9.1%) patients had an occluded artery (group 2). At baseline, there were no significant differences in hand grip test between the two groups (42 ± 11 kg in group 1 and 41 ± 17 kg in group 2, P = 0.74). In both groups, after the procedure, the hand grip test values was significantly reduced compared with baseline values (40 ± 11 kg in group 1, P < 0.0001 and 37 ± 17 kg in group 2, P = 0.007). Finally, at follow-up, in both groups, the hand grip test values returned to baseline values. Thumb and forefinger pinch tests did not show significant differences after the procedure and at follow-up, compared with baseline.

CONCLUSIONS

Radial artery occlusion after percutaneous coronary procedures was not associated with a reduction in hand and finger strength.

Randomized comparative study of left versus right radial approach in the setting of primary percutaneous coronary intervention for ST-elevation myocardial infarction

BACKGROUND

Growing evidence suggests that the left radial approach (LRA) is related to decreased coronary procedure duration and fewer cerebrovascular complications as compared to the right radial approach (RRA) in elective percutaneous coronary intervention (PCI). However, the feasibility of LRA in primary PCI has yet to be studied further. Therefore, the aim of this study was to investigate the efficacy of LRA compared with RRA for primary PCI in ST-elevation myocardial infarction (STEMI) patients.

MATERIALS AND METHODS

A total of 200 consecutive patients with STEMI who received primary PCI were randomized to LRA (number [n]=100) or RRA (n=100). The study endpoint was needle-to-balloon time, defined as the time from local anesthesia infiltration to the first balloon inflation. Radiation dose by measuring cumulative air kerma (CAK) and CAK dose area product, as well as fluoroscopy time and contrast volume were also investigated.

RESULTS

There were no significant differences in the baseline characteristics between the two groups. The coronary procedural success rate was similar between both radial approaches (98% for left versus 94% for right; P=0.28). Compared with RRA, LRA had significantly shorter needle-to-balloon time (16.0±4.8 minutes versus 18.0±6.5 minutes, respectively; P=0.02). Additionally, fluoroscopy time (7.4±3.4 minutes versus 8.8±3.5 minutes, respectively; P=0.01) and CAK dose area product (51.9±30.4 Gy cm(2) versus 65.3±49.1 Gy cm(2), respectively; P=0.04) were significantly lower with LRA than with RRA.

CONCLUSION

Primary PCI can be performed via LRA with earlier blood flow restoration in the infarct-related artery and lower radiation exposure when compared with RRA; therefore, the LRA may become a feasible and attractive alternative to perform primary PCI for STEMI patients.

Risk factors of failed transradial approach for percutaneous coronary interventions in Chaoshan Chinese: a locally retrospective analysis

BACKGROUND

Transradial approach PCI reduces vascular complications compared with a transfemoral approach (TFA). TRA-PCI failure has been reported in 5-10% of cases. Reported studies showed that age > 75 years, previous CABG, short stature, female sex, and cardiogenic shock were independent predictors of TRA-PCI failure. However, related risk factors and causes of TRA-PCI failure are not well characterized, especially among Asians.

OBJECTIVES

To explore the risk factors and causes of transfemoral approach (TRA)-PCI failure in Chaoshan area.

METHODS

We retrospectively analyzed our databases for all patients who underwent TRA-PCI from January 2011 to June 2014 in the First Affiliated Hospital of Shantou University Medical College. Univariate and multivariate analyses were performed to determine independent risk factors of TRA-PCI failure and the causes of TRA-PCI failure.

RESULTS

A total of 1,276 patients underwent TRA-PCI. From univariate analyses, patients in the TRA-PCI failure group were significantly in women, and more likely to be age > 75 years compared with TRA-PCI success group. Besides, patients in the TRA-PCI failure group were significantly more likely to suffer from left main coronary disease, more heparin dose, longer fluoroscopy time, and more PCI procedural failure compared with the TRA-PCI successful group. From multivariate analysis, female and age > 75 years were independent predictors of TRA-PCI failure. The causes of TRA-PCI failure included unsuccessful radial artery puncture in 34, vascular anomaly in 54, and the problems of guide catheter and guide wire in 26 patients.

CONCLUSIONS

Being female and age > 75 years were independent risk factors of TRA-PCI failure. TRA-PCI failures indicated more possibility to suffer from left main coronary disease. The causes of TRA-PCI failure were complicated, among of those vascular abnormalities was an important factor.

Usefulness and safety of a guide catheter extension system for the percutaneous treatment of complex coronary lesions by a transradial approach

OBJECTIVE

The aim of this study was to describe our initial experience with the GuideLiner® catheter (Vascular Solutions Inc.) in the transradial treatment of complex lesions.

MATERIALS AND METHODS

The clinical, angiographic and procedural data of percutaneous coronary interventions where GuideLiner was used during 2013 were collected. The transradial approach was used in all cases. The indication for its use, efficacy and periprocedural complications were determined. Sixteen consecutive procedures (in 15 patients; 12 males and 3 females) were evaluated. The indication for the use of GuideLiner was a difficulty to advance and properly position a stent through a tortuous and/or calcified artery despite using high-support guide catheters or other useful techniques.

RESULTS

Of the 16 angiographic procedures, 14 (87.5%) were successful (stent deployment in 13 cases and a drug-eluting balloon in 1 case). Unsuccessful cases were a chronic total occlusion and a diffusely diseased left anterior descendant artery. A type B dissection of a proximal left circumflex artery was the only periprocedural complication.

CONCLUSION

Use of the GuideLiner was an effective and safe technique for the percutaneous treatment of complex coronary lesions in which the adequate progress of angioplasty devices had failed. GuideLiner was particularly helpful when using the transradial approach. Only one minor complication was recorded.