/index.php/rss?format=feed

$fields = json_decode($item->extra_fields);
            $item->title = $this->escape($item->title);
            if ($fields[1]->value && $fields[1]->value !== '')
            {
                $item->title = html_entity_decode($fields[1]->value.' '.$item->title);
            } 

            else 
            {
                $item->title = html_entity_decode($item->title);
            }

\www\components\com_k2\views\itemlist\view.feed.php

\www\components\com_k2\views\itemlist

$feedItem->description = $item->description;

$feedItem->description = html_entity_decode('<img hspace="5px"; align="left"; height="150px"; src="'.$fields[0]->value.'">'.$item->description);