Tissue ablation devices, systems, and methods for monitoring or analyzing one or more aspects of tissue ablation. The disclosure include ablation catheters comprising an elongate shaft an inflatable balloon carried by a distal region of the shaft a flexible circuit, including a conductor in electrical communication with an ablation electrode, disposed outside of and carried by an outer surface of the inflatable balloon and an ultrasound monitoring member, configured for use in monitoring at least one aspect of tissue ablation with the ablation electrode.
