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Bilateral phrenic nerve paralysis is a rare cause of dyspnea, especially in the supine position and on exertion1. Many of these paralyses are related to neuropathies, and amyotrophic neuralgia is one of them. It is a rare entity of still unknown etiology described by Parsonage and Turner in 1948; in many patients, there is a history of infections, surgical interventions or vaccines2. Heart failure (HF) is the most commonly diagnosed heart disease; approximately half the patients have a preserved ejection fraction (HFpEF), and its main symptom is severe intolerance to exercise3. The coexistence of other comorbidities such as a chronic obstructive pulmonary disease can hinder the HFpEF diagnosis.

archivos de cardiología de méxico

Insuficiencia cardíaca con fracción de eyección preservada en un paciente con parálisis frénica bilateral. Cuando los biomarcadores no ayudan al diagnóstico