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Acute rupture of sinus of valsalva in the right atrium during attempted pregnancy.

A 36-year-old woman was admitted to the first-aid unit for sudden dyspnea and palpitation. Significant cardiac findings were a loud continuous murmur (2–3/6 on Levine’s scale) at the second intercostal space on the left sternal border, absent in prior examination. Gas analysis showed transient hypoxemia with normocapnia. Hypoxemia and symptoms rapidly normalized. D-dimer measurement was positive. An electrocardiogram showed negative T waves on antero-lateral precordial leads.