Sick Sinus Syndrome as the Initial Manifestation of Cardiac Metastasis in Squamous Cell Lung Cancer: A Case Report

Abstract

We describe the fi rst case report of a patient with cardiac metastasis from squamous cell cancer of the lung that manifested as a symptomatic tachy-bradyarrhythmia suggestive of a sick sinus syndrome. This condition generally follows a silent course. We hypothesize that the arrhythmias were attributed to the nodular metastatic lesions directly and extensively invading the right atrium and other parts of the heart.