An unusual cause of palpitations requiring atrioventricular node ablation and pacemaker therapy.

We report the unique case of a patient who complained of palpitations resistant to many antiarrhythmic treatment strategies, finally requiring treatment with atrioventricular node ablation and pacemaker implantation. A pheochromocytoma was eventually diagnosed, 16 years after the onset of her symptoms.

Familial Conn's syndrome.

We describe the occurrence of primary hyperaldosteronism in two sisters. Although this is only the second published report of familial Conn's syndrome, it does have implications for the relatives of patients with Conn's syndrome and these are discussed.

A comparison of sustained release verapamil versus atenolol for 24 h protection from exercise-induced angina pectoris.

We have compared the efficacy of a once daily 360 mg sustained release preparation of verapamil (SRV) with that of once daily 100 mg atenolol in exercise-induced angina. The study was randomized, double-blind and cross-over in design involving 30 patients with chronic stable angina. A 2-week run-in placebo phase was followed by two 4-week periods of active treatment.