Science AI Journal
Medicine · Research topic

Open research questions in Cardiac Ischemia and Reperfusion

29 unresolved questions extracted from the limitations and future-work sections of 160 Cardiac Ischemia and Reperfusion papers in our library. Each links back to the study that raised it.

What the literature leaves open

  • However, the magnitude, mechanistic specificity, and translational relevance remain uncertain because of heterogeneity, possible publication bias, unclear methodological quality, limited pharmacokinetic exposure data, and scarce sex-balanced, comorbid, and large-animal evidence.

    Quercetin-associated cardioprotection in preclinical myocardial ischemia-reperfusion injury: a systematic review and meta-analysis · 2026 · DOI

  • Quercetin, a plant-derived flavonoid, has been investigated as a potential cardioprotective agent in preclinical MIRI models; however, its effect magnitude, dose-exposure relevance, and mechanistic specificity remain uncertain.

    Quercetin-associated cardioprotection in preclinical myocardial ischemia-reperfusion injury: a systematic review and meta-analysis · 2026 · DOI

  • Cardioprotection beyond timely reperfusion was first demonstrated in the seminal experimental dog studies of ischemic conditioning by Murry, Reimer, and Jennings in the 1980s and initiated a tsunami of experimental studies in various experimental models to identify the underlying signal transduction, but has not yet been established in clinical practice.

    Historical account of reperfusion therapy and the development of cardioprotection beyond reperfusion · 2026 · DOI

  • Abstract Purpose Ischemic preconditioning (IPC) and remote ischemic preconditioning (RIPC) independently enhance endothelial function and flow mediated dilation (FMD); yet the underlying mechanisms remain incompletely defined.

    Cyclooxygenase-dependent contribution to increased flow mediated dilatation following a week of repeated ischemic preconditioning · 2026 · DOI

  • However, the current evidence should still be interpreted with caution, since the studies present substantial methodological heterogeneity, small samples, and partially conflicting results, especially regarding the distinction between a physiological effect intrinsic to IPC and the influence of placebo. Therefore, although the method appears promising as an ergogenic strategy in the context of resistance training, there is still insufficient basis to recommend it broadly and definitively.

    EFFECTS OF ISCHEMIC PRECONDITIONING ON RESISTANCE EXERCISE PERFORMANCE: A SYSTEMATIC REVIEW · 2026 · DOI

  • Given its non-invasive nature, favorable safety profile, and association with reduced hospital length of stay, HPC warrants further investigation and consideration as a lung-protective strat- egy in pediatric thoracic anesthesia.

    Hypoxic preconditioning improves intraoperative oxygenation and postoperative recovery in children undergoing thoracoscopic surgery: a randomized controlled trial · 2026 · DOI

  • Remote ischemic conditioning is a safe and highly translatable therapeutic strategy for ischemic stroke. It exerts multifaceted neuroprotective and neurorestorative effects. These effects occur through the modulation of neuroinflammation and diverse pro- grammed cell death pathways. The treatment also preserves BBB integrity, promotes angiogenesis, and enhances remyelination. The specific timing of intervention is critical. However, this review has certain limitations. First, this article extensively describes the neuroprotective effects of RIPostC. It fails to compare RIPostC with other treatments. It also lacks a summary of mechanistic differences. This omission largely occurs because current research focuses heavily on RIPostC. Second, RIC is an effective treatment for multiple diseases. However, this review focuses solely on ischemic stroke. In summary, current research indicates a clear trend. The therapeutic efficacy of RIC strictly depends on successful cerebral reperfusion. The combined application of RIPreC and RIPostC shows significant benefits. These benefits appear specifically in patients with successful vessel recanalization. Furthermore, re- searchers must consider the physiological state of patients. Key variables include circadian rhythms and baseline inflammation levels. Lipoprotein(a) and mean corpuscular hemoglobin are also critical. These parameters significantly influence therapeu- tic outcomes. Looking forward, the successful clinical implementation of RIC depends on these core elements. First, researchers must establish standardized treatment protocols. These protocols must target specific clinical scenarios. Second, the medical community needs a reliable biomarker. This biomarker will confirm the therapeutic efficacy of RIC. Third, future studies should optimize combination therapy regimens. Finally, further mechanistic research on CRIC is necessary. This research will clarify its role in long term neurorestorative effects.

    The role of remote ischemic conditioning in ischemic stroke: neuroprotective mechanisms and future directions · 2026 · DOI

  • Tianrui Yu 1,2†, Yanghang Chen 1,2,3†, Yutao Lu 1,2, Fan Yu 4, Yuanyuan Xiang 2, Xinyue Kou 1,2, Hui Yang 1,2, Diyang Lyu 5, Moxin Wu 2, Xiaoping Yin 1,2, Zhiying Chen 1,2,6 and Manqing Zhang 6* 1Department of Neurology, Affiliated Hospital of Jiujiang University, Jiujiang, Jiangxi, China, 2Jiujiang Clinical Precision Medicine Research Center, Jiujiang, Jiangxi, China, 3Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China, 4College of Life Sciences, Nanchang University, Nanchang, Jiangxi, China, 5Department of Neurology, Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China, 6Jiangxi Provincial Key Laboratory of Cell Precision Therapy, School of Basic Medical Sciences, Jiujiang University, Jiujiang, Jiangxi, China Despite advances in vessel recanalization, ischemic stroke remains a leading cause of mortality, highlighting the need for comprehensive neuroprotective strategies such as remote ischemic conditioning (RIC). This review evaluates the multitargeted mechanisms of RIC, its progress in clinical translation, and the key factors determining its efficacy. In preclinical models, RIC exerts neuroprotection by modulating neuroinflammation, preserving the blood-brain barrier, and promoting angiogenesis and remyelination. Notably, it suppresses multiple programmed cell death pathways, including pyroptosis, apoptosis, ferroptosis, and disulfidptosis. However, analyses of recent high-quality clinical trials (e.g., SERIC- EVT, RESIST, and RICAMIS) reveal heterogeneous efficacy, indicating that clinical success is highly dependent on the specific execution protocol and successful cerebral reperfusion. Furthermore, critical patient-specific variables such as circadian rhythms, baseline systemic inflammation, and levels of both lipoprotein(a) and mean corpuscular hemoglobin (MCH) significantly influence therapeutic outcomes. Ultimately, while RIC is a highly translatable therapeutic strategy, its successful clinical application relies on the standardization of treatment protocols, the use of precision medicine to identify optimal responders, and its integration with existing therapies to maximize long-term stroke recovery.

    The role of remote ischemic conditioning in ischemic stroke: neuroprotective mechanisms and future directions · 2026 · DOI

  • Potential interaction effects between RIC and population, surgery, and experimental characteristics such as type of anesthesia and co-medication may have impacted results but were not fully examined.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • Further studies need to incorporate a standardized definition and assessment for POCD to achieve better understanding of RIC effects on perioperative neurocognitive disorders.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • The mechanisms through which RIC may be protective in the perioperative setting remain variably implicated across inflammatory/immune, neurological, cardiovascular, and genetic pathways without clear consensus.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • The majority of RCTs were conducted in cardiac surgery settings (66.7%), while remaining surgical settings were mixed, limiting the representation of RIC effects in non-cardiac surgeries.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • Future clinical trials should develop harmonization standards for POCD assessment, including domain-specific measures, sensitivity to subtle cognitive changes, and complementary subjective cognitive measures.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • We previously demonstrated in rats that noninvasive delayed limb ischemic preconditioning (LIPC) induced by three cycles of 5-min occlusion and 5-min reperfusion of the left hind limb per day for three days confers the same cardioprotective effect as local ischemic preconditioning of the heart, but the mechanism has not been studied in depth.

    Noninvasive Delayed Limb Ischemic Preconditioning Attenuates Myocardial Ischemia-Reperfusion Injury in Rats by a Mitochondrial KATP Channel-Dependent Mechanism · 2011 · DOI

  • This review summarizes current limited evidence for the involvement of ATP-sensitive potassium channels, reactive oxygen species, nitric oxide and various protein kinases in cardioprotective effects of chronic hypoxia.

    Molecular mechanisms of cardiac protection by adaptation to chronic hypoxia. · 2004 · DOI

  • Further mechanistic and translational studies are warranted to elucidate the precise signalling pathways and clinical relevance of these observations.

    The Mitigating Effect of Remifentanil Against Sevoflurane-Induced Cardiotoxicity in Human Cardiomyocytes via TRPA1 Channels · 2026 · DOI

  • Introduction: Sevoflurane may exert cytotoxic effects in some cell types, but its impact on human cardiomyocytes and the potential protective role of remifentanil remain unclear.

    The Mitigating Effect of Remifentanil Against Sevoflurane-Induced Cardiotoxicity in Human Cardiomyocytes via TRPA1 Channels · 2026 · DOI

  • Exploratory subgroup analyses suggested attenuated responsiveness in comorbid or metabolically altered models, but this finding was limited and confounded.

    Quercetin-associated cardioprotection in preclinical myocardial ischemia-reperfusion injury: a systematic review and meta-analysis · 2026 · DOI

  • While previous studies suggest that brain-heart electrophysiological interactions may predict severity and prognosis after hypoxic brain injury coma, little is known about the brain-heart dynamics at near-death.

    Brain-heart interactions underlying differential recovery after transient systemic anoxia · 2026 · DOI

  • Very few relevant publications existed for some outcomes of interest (e.g., MoCA scores), limiting the strength of particular findings and contributing to differences in results across timepoints.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

  • Meta-analyses and meta-regressions did not examine potentially biologically relevant protocol-level factors such as cuff pressure, cycle number/duration, timing relative to anesthesia/insult, and limb used; the insufficient number of eligible studies made such subgroup analyses infeasible.

    Effects of perioperative remote ischemic conditioning on postoperative delirium and cognitive outcomes: a systematic review and meta-analysis of randomized controlled trials · 2026 · DOI

Most-cited papers in Cardiac Ischemia and Reperfusion

Most recent work

Find a gap in your own Cardiac Ischemia and Reperfusion sub-topic

This page shows what the Cardiac Ischemia and Reperfusion literature already flags as unresolved. To narrow it to your specific question, run the guided finder — it searches the gap library on demand and checks candidates against 250M+ OpenAlex works.

Open the Research Gap Finder →

Related topics in Medicine

Substance Abuse Treatment and Outcomes
989 open questions
Artificial Intelligence in Healthcare and Education
607 open questions
Attention Deficit Hyperactivity Disorder
448 open questions
Physical Activity and Health
436 open questions
Smoking Behavior and Cessation
402 open questions
Innovations in Medical Education
364 open questions
Dementia and Cognitive Impairment Research
363 open questions
HIV/AIDS Research and Interventions
342 open questions
29 open questions have been extracted from the limitations and future-work passages of 160 Cardiac Ischemia and Reperfusion papers in our library. Each one below links back to the study that raised it, so you can read the original claim in context.

Tools for your next paper

Gaps & Literature SearchFind open questions in any field — 120,000+ open gaps mined from our own library.Pre-CheckIs your paper ready? A Tier 1–5 acceptance probability in seconds.Journal FinderA ranked shortlist of target journals from a 17,500-venue index.Duplicate Publication CheckerCheck prior-publication & salami-slicing risk across 8 sources.Citation GeneratorFreeA DOI or title → APA, MLA, Vancouver, Chicago, BibTeX, RIS. No signup.Graphical Abstract MakerFreeTurn your findings into a colorblind-safe graphical abstract.

Compare the category — Honest roundups of the AI research tools, ours listed alongside the alternatives.

Command palette

Jump anywhere, run any action.