Complete heart block ensuing from a metastatic small cell carcinoma: a case report oleh Pedro Pallangyo, Garvin Kweka, Frederick Lyimo, Henry Mayala, Happiness J. Swai, Zabella Mkojera, Nsajigwa Misidai, Makrina Komba, Jalack Millinga, Smita Bhalia, Faustina Mwapinga, Salma Wibonela, Mohamed Janabi