Hyperventilation and Myocardial Infarction

Chelmowski, Mark K.; Keelan, Michael H.

doi:10.1378/chest.93.5.1095

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…Untoward car diovascular events including ventricular tachycardias and lethal myocardial infarctions have been reported [22,23]. Based on our observations myocardial ischemia might not only be caused by a reduction of coronary blood flow but probably augmented by posthvperventilatory hypoxemia.…”

Section: Discussionsupporting

confidence: 60%

Changes in Arterial and Transcutaneous Oxygen and Carbon Dioxide Tensions during and after Voluntary Hyperventilation

Steurer¹,

Hoffmann²,

Dür

et al. 1997

Respiration

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The purposes of our study were (1) to investigate whether a 3-min short-term hyperventilation leads to posthyperventilatory hypoxemia and (2) to assess the role of transcutaneous blood gas measurements for monitoring oxygen and carbon dioxide changes during and after the test. In 10 male volunteers arterial and transcutaneous blood gases were measured simultaneously before, during and after a 3-min voluntary hyperventilation maneuver. Baseline arterial PO₂ increased from 13.7 ± 0.4 kPa (103 ± 3 mm Hg) to 18.6 ± 0.3 kPa (139 ± 2.3 mm Hg; p < 0.005 compared to baseline) during hyperventilation. After the provocation test posthyperventilatory hypoxemia occurred with a minimal mean value of 7.8 ± 1.3 kPa (58.5 ± 9.8 mm Hg; p < 0.05 compared to baseline). Whereas close agreement between arterial and transcutaneous measurements was obtained for carbon dioxide values before hyperventilation, transcutaneous O₂ consistently underestimated arterial O₂. A short-term over-breathing of 3 min causes a significant posthyperventilatory hypoxemia. We hypothesize that posthyperventilatory hypoxemia is caused by hypopnea as a result of depleted CO₂ body stores. Noninvasive transcutaneous blood gas measurements are not reliable for monitoring blood gas changes during and after hyperventilation, most probably because of the slow response time of the electrodes and the reflex vasoconstriction of the skin vessels.

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Section: Discussionsupporting

confidence: 60%

Changes in Arterial and Transcutaneous Oxygen and Carbon Dioxide Tensions during and after Voluntary Hyperventilation

Steurer¹,

Hoffmann²,

Dür

et al. 1997

Respiration

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“…IPS may be an important way of checking the effectiveness of medication and the risk of further seizure in photosensitive individuals. Different from hyperventilation (HV), which may induce myocardial infarction, respiratory disease and stroke in some patients with pre-existing medical conditions [32,33]. There were no symptomatic cardiovascular, respiratory or cerebrovascular adverse events reported in this study.…”

Section: Discussionmentioning

confidence: 64%

Photosensitive epilepsy and photosensitivity of patients with possible epilepsy in Chinese Han race: A prospective multicenter study

Bai

Zhang

Ruan

et al. 2019

Journal of Clinical Neuroscience

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a b s t r a c tPhotosensitive is probably caused by multiple factors including gender, familiar, etc. We aim to study the clinical and EEG features of Chinese Han patients with photosensitivity. A total of 5482 consecutive patients with possible epilepsy from 3 center in China. Of the 73 patients with PPR to IPS, 48 were female. 69.9% patients were evoked by frequency ranged 8 Hz-25 Hz, with accompanying seizures in 13 patients. 6 of 9 patients with eyes closure sensitivity experienced epileptic seizures during IPS. We found some new features: 1) The patients with eyes closure sensitivity apt to experience electro-clinical seizures provoked by IPS; 2) Female epilepsy patients with PPR and ECS maybe difficult to be seizure free. Preventive measures for related seizures should be performed to the patients with generalized PPR, upper threshold evoking frequency, and eyes closure sensitivity when they received the IPS.

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“…17 Careful selection of patients, through the use of departmental protocols, may have contributed to this low complication rate. There are case reports in the literature of HV precipitating death in a patient with cardiorespiratory disease, 18 myocardial infarction both without 19 and with 20 known coronary artery disease, apnoea in a patient with hypoxaemia 21 and even asystole with syncope in healthy athletes. 22 Whilst these may be rare adverse events, for the most part in patients with pre-existing medical conditions, there is little room for complacency and a need for clear guidelines.…”

Section: Discussionmentioning

confidence: 99%

Hyperventilation during electroencephalography: Safety and efficacy

Kane

Grocott

Kandler

et al. 2014

Seizure

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HV is rarely associated with adverse events, but contributes to the diagnosis and classification of seizure disorders in an appreciable proportion of patients with epilepsy and non-epileptic attacks. These findings confirm that HV in selected patients is a valid activation technique in diagnostic EEG, where the potential benefits out weigh the risks, and also provide information that may assist the informed consent process.

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Hyperventilation and Myocardial Infarction

Cited by 14 publications

References 20 publications

Changes in Arterial and Transcutaneous Oxygen and Carbon Dioxide Tensions during and after Voluntary Hyperventilation

Changes in Arterial and Transcutaneous Oxygen and Carbon Dioxide Tensions during and after Voluntary Hyperventilation

Photosensitive epilepsy and photosensitivity of patients with possible epilepsy in Chinese Han race: A prospective multicenter study

Hyperventilation during electroencephalography: Safety and efficacy

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